Waist rest lifting mechanism and swivel chair

Abstract

The utility model belongs to the technical field of office furniture, and particularly relates to a waist rest lifting mechanism and a swivel chair, in particular to a waist rest connecting body which linearly lifts and moves relative to a locking plate, and a locking block groove facing the locking plate is formed in the waist rest connecting body. A compound motion locking block which performs lifting displacement and swinging relative to the locking block groove by taking a transverse elastic piece as a supporting point is connected in the locking block groove through the transverse elastic piece; a locking groove is formed in the locking plate; when the transverse elastic piece releases transverse elastic force, the composite motion locking block and the locking groove are matched through a concave-convex locking structure. A first unlocking position enabling the concave-convex locking structure to cancel locking matching is arranged at the top of the locking groove, an unlocking keeping structure enabling the composite motion locking block to keep an unlocking state is arranged between the locking block groove and the composite motion locking block, and a second unlocking position enabling the unlocking keeping structure to cancel the keeping state is arranged on the bottom side of the locking groove.

Description

TECHNICAL FIELD

[0001] The utility model belongs to office furniture technical field, concretely relates to a waist rest lifting mechanism and swivel chair. BACKGROUND

[0002] The part of the body or quadruped below the iliac crest, distributed on both sides of the spine, between the hip and the false ribs. The part of certain objects corresponding to the waist position or similar to the waist; the middle part of the object, especially the narrow or thin middle part. The waist is the most important connecting part of the human body, and many activities of the human body need the waist to support. If the waist health care is not done in young age, the waist problem will gradually appear when the age increases. Therefore, the waist rest provided on the seat can well protect the waist.

[0003] In the patent CN218164661U, a waist rest waist adjusting device is disclosed, which comprises a waist rest support, which is arranged on the waist rest support; the waist rest support has elasticity and the upper and lower ends are rotatably connected with the waist rest support; the lower part of the waist rest support has a sliding support part, and the front end of the sliding support part is slidably connected with a sliding seat; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove arranged on the sliding support part and a gear adjusting tooth located in the annular guide groove; a positioning slot is arranged on one side of the gear adjusting tooth; an adjusting part with a straight tendency is arranged in the sliding seat, and a pin is arranged on the adjusting part; during the upward movement of the sliding seat, the pin moves upward along the annular guide groove and can be clamped in the positioning slot under the restoring force of the adjusting part; during the downward resetting process of the sliding seat, the pin moves downward along the annular guide groove and resets; the lower end of the waist rest support is rotatably connected with the sliding seat; the sliding seat is adjusted to make the waist rest support deform before being pushed forward or retracted.

[0004] In the above-mentioned scheme, the height change of the waist rest is realized by the cooperation of the positioning slot and the pin, and the clutching effect of the positioning slot and the pin is realized by the adjusting part. However, during the adjustment, one hand needs to move the waist rest and the other hand needs to control the adjusting part, and the adjusting part needs to be manually controlled every time an gear is adjusted, which is very cumbersome to operate. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above-mentioned problem, and provides a waist rest lifting mechanism and swivel chair which can solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The lumbar support lifting mechanism comprises a lumbar support connecting body linearly moving up and down relative to a locking plate, the lumbar support connecting body is provided with a locking block groove facing the locking plate, a composite motion locking block is connected to the locking block groove through a transverse elastic member, the composite motion locking block moves up and down and swings relative to the locking block groove with the transverse elastic member as a support point, and the locking plate is provided with a locking groove; when the transverse elastic member releases the transverse elastic force, the composite motion locking block and the locking groove are matched through a concave-convex locking structure, a first unlocking position is arranged at the top of the locking groove to cancel the locking of the concave-convex locking structure, an unlocking retaining structure is arranged between the locking block groove and the composite motion locking block to keep the composite motion locking block in an unlocked state, and a second unlocking position is arranged at the bottom side of the locking groove to cancel the retaining state of the unlocking retaining structure.

[0008] In the lumbar support lifting mechanism, the unlocking retaining structure comprises an unlocking retaining surface one arranged on the side of the composite motion locking block away from the transverse elastic member and an unlocking retaining surface two arranged at the bottom of the locking block groove, and the unlocking retaining surface one and the unlocking retaining surface two are vertically distributed.

[0009] In the lumbar support lifting mechanism, the transverse elastic member is in a straight line state when the concave-convex locking structure is locked and matched, and is in an arch state when the concave-convex locking structure is unlocked and matched and kept in an unlocked state.

[0010] In the lumbar support lifting mechanism, the unlocking retaining surface two and the second unlocking position are relatively vertically distributed.

[0011] In the lumbar support lifting mechanism, the first unlocking position comprises an inclined unlocking surface in an inclined distribution and an unlocking abutting surface connected to the top side of the inclined unlocking surface, and the inclined unlocking surface and the unlocking abutting surface are in an obtuse angle distribution.

[0012] In the lumbar support lifting mechanism, the concave-convex locking structure comprises a locking tongue arranged in the locking groove and at least partially protruding from the unlocking retaining surface one away from the transverse elastic member, a plurality of locking tooth grooves are arranged on the groove wall of the locking groove in a continuous distribution, and the locking tongue is matched with any one of the locking tooth grooves.

[0013] In the lumbar support lifting mechanism, at least part of the locking tongue protrudes from the unlocking retaining surface one away from the transverse elastic member.

[0014] In the lumbar support lifting mechanism, the top side of the composite motion locking block has a circular arc convex surface, the top side of the locking block groove has a circular arc concave groove, and the diameter of the groove opening of the circular arc concave groove is greater than the diameter of the circular arc convex surface.

[0015] In the waist rest lifting mechanism, the transverse elastic member is a spring, the first transverse column is arranged on the side of the composite motion lock block away from the lock tongue, one end of the spring is sleeved on the first transverse column and abuts against the side of the composite motion lock block away from the lock tongue, the second transverse column is arranged on the slot wall of the lock block slot, and the other end of the spring is sleeved on the second transverse column and abuts against the slot wall of the lock block slot.

[0016] The utility model discloses still provide a swivel chair, the swivel chair includes the waist rest lifting mechanism.

[0017] The utility model discloses the advantages have:

[0018] At two stroke end points of relative movement of the connecting body and the locking plate, the mechanism that makes the lock tongue to remove and lock the tooth slot locking and the mechanism that restores the locking are arranged respectively, the position of the composite motion lock block in the lock block slot is changed through the pushing of the lock tongue on the upper and lower ends of the locking groove, the composite motion lock block can switch between the locking position and the unlocking position without additional control, and the trouble that needs both hands to operate simultaneously when adjusting the waist rest each time is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is whole structure schematic diagram of the utility model.

[0020] Figure 2 It is locking plate and connecting body cooperation schematic diagram of the utility model.

[0021] Figure 3 It is locking plate structure schematic diagram of the utility model.

[0022] Figure 4 It is connecting body structure schematic diagram of the utility model.

[0023] Figure 5 It is composite motion lock block structure schematic diagram of the utility model.

[0024] Figure 6 It is the schematic diagram of entering the locking state of the utility model.

[0025] Figure 7 It is the schematic diagram of exiting the locking state of the utility model.

[0026] In the drawing, the locking plate 1, the locking groove 11, the first unlocking position 12, the inclined surface unlocking surface 121, the unlocking abutting surface 122, the second unlocking position 13, the locking tooth slot 14, the connecting body 2, the lock block slot 21, the unlocking retaining surface two 22, the circular arc groove 23, the composite motion lock block 3, the circular arc convex surface 31, the unlocking retaining surface one 32, the lock tongue 33, the transverse elastic member 4. DETAILED DESCRIPTION

[0027] The utility model discloses a specific embodiment as follows and further describes the technical scheme of the utility model in connection with the drawings, but the utility model is not limited to these embodiments.

[0028] Embodiment 1

[0029] As Figures 2-7 The waist support lifting mechanism comprises a waist support connecting body 2 linearly lifting and moving relative to a locking plate 1, the waist support connecting body 2 is provided with a locking block groove 21 facing the locking plate 1, a composite motion locking block 3 is connected to the locking block groove 21 through a transverse elastic element 4 and can lift and move and swing relative to the locking block groove 21 with the transverse elastic element 4 as a support point, and the locking plate 1 is provided with a locking groove 11; when the transverse elastic element 4 releases the transverse elastic force, the composite motion locking block 3 and the locking groove 11 are matched through a concave-convex locking structure, the top of the locking groove 11 is provided with a first unlocking position 12 for canceling the locking of the concave-convex locking structure, and an unlocking maintaining structure is arranged between the locking block groove 21 and the composite motion locking block 3 for maintaining the unlocking state of the composite motion locking block 3, and the bottom side of the locking groove 11 is provided with a second unlocking position 13 for canceling the maintaining state of the unlocking maintaining structure.

[0030] That is, at the two stroke endpoints of the relative movement of the connecting body 2 and the locking plate 1, mechanisms for unlocking and restoring the locking of the locking tongue 33 and the locking tooth groove 14 are arranged respectively, the position of the composite motion locking block 3 in the locking block groove 21 is changed through the pushing of the locking tongue 33 at the upper and lower ends of the locking groove 11, so that the composite motion locking block 3 can be switched between the locking position and the unlocking position without additional control components, and the trouble of needing to operate with both hands at the same time each time the waist support is adjusted is avoided.

[0031] The elastic element 4 can be a spring or a spring sheet or the like that can bear extrusion and bending force.

[0032] In the embodiment, the unlocking maintaining structure comprises an unlocking maintaining surface one 32 arranged on the side of the composite motion locking block 3 away from the transverse elastic element 4 and an unlocking maintaining surface two 22 arranged at the bottom of the locking block groove 21, and the unlocking maintaining surface one 32 and the unlocking maintaining surface two 22 are distributed along the vertical direction.

[0033] In the unlocking state, the unlocking maintaining surface one 32 and the unlocking maintaining surface two 22 are kept in the state of abutting against each other under the action of the transverse elastic element 4, and the vertical distribution of the two is consistent with the movement direction of the connecting body 2, which is beneficial to the vertical separation of the two when unlocking is needed.

[0034] In the embodiment, the unlocking maintaining surface two 22 and the second unlocking position 13 are arranged in a relative vertical distribution.

[0035] The two forces are perpendicular to each other and do not interfere with each other, so that the upward movement of the composite motion lock block 3 can be stable when the locking cooperation is withdrawn, and the waist rest can be more smooth when manually adjusted.

[0036] In this embodiment, the transverse elastic member 4 is in a straight line state when the convex-concave locking structure is in locking cooperation, and is in an arch shape state when the convex-concave locking structure is in unlocking cooperation.

[0037] When the convex-concave locking structure is in locking cooperation, the composite motion lock block 3 is in a locking holding state, at this time, the composite motion lock block 3 is in contact with the locking tooth groove 14 on one side, and the contact direction of the two is consistent with the setting mode of the transverse elastic member 4, so that the transverse elastic member 4 can keep a straight line state, and when the composite motion lock block 3 is in an unlocking holding state, the composite motion lock block 3 is displaced and the convex-concave locking structure is separated, and the force on the contact end of the composite motion lock block 3 is horizontally displaced from the transverse elastic member 4, so that the transverse elastic member 4 is bent to an arch shape.

[0038] In this embodiment, the first unlocking position 12 includes an inclined unlocking surface 121 and an unlocking contact surface 122 connected to the top side of the inclined unlocking surface 121, and the inclined unlocking surface 121 and the unlocking contact surface 122 are distributed at an obtuse angle.

[0039] The inclined unlocking surface 121 extends from the locking tooth groove 14, and when the waist rest rises, the locking tongue 33 is pushed by the inclined unlocking surface 121 from the locking tooth groove 14 to the other side to separate from the locking tooth groove 14 and the locking tongue 33, and then the locking tongue 33 is acted on by the unlocking contact surface 122, forcing the composite motion lock block 3 to move away from the convex-concave locking structure and allowing the first unlocking holding surface 32 and the second unlocking holding surface 22 to abut to enter the unlocking holding state.

[0040] The inclined unlocking surface 121 and the unlocking contact surface 122 are connected at an obtuse angle, so that the locking tongue 33 slides more smoothly from the inclined unlocking surface 121 to the unlocking contact surface 122.

[0041] In this embodiment, the convex-concave locking structure includes a locking tongue 33 arranged in the composite motion lock block 3 and extending into the locking groove 11, and a plurality of locking tooth grooves 14 are arranged on the groove wall of the locking groove 11, and the locking tongue 33 cooperates with any one of the locking tooth grooves 14.

[0042] The locking tooth groove 14 is a ratchet with the tooth tip upward, and the locking tongue 33 slides upward along the ratchet contour with the connecting body 2, and when the locking tongue 33 slides to the tooth abdomen of the ratchet, it can be lifted in the vertical direction, i.e. the waist rest is fixed at the required height, and each locking tooth groove 14 corresponds to a different height of the waist rest.

[0043] In this embodiment, at least a portion of the locking tongue 33 protrudes from the unlocking holding surface 1 32 on the side away from the transverse elastic member 4 .

[0044] The portion of the compound motion locking block 3 disposed in the locking block slot 21 is flush with the slot, and the protruding portion of the lock tongue 33 forms a 90° angle with the unlocking retaining surface 1 32, which can just be attached to the slot edge of the locking block slot 21, so that the compound motion locking block 3 maintains better stability when moving in the locking block slot 21.

[0045] In this embodiment, the top side of the compound motion locking block 3 has an arc convex surface 31, the top side of the locking block groove 21 has an arc groove 23, and the diameter of the notch of the arc groove 23 connected to the locking block groove 21 is larger than the diameter of the arc convex surface 31.

[0046] The part of the compound motion locking block 3 in the locking block groove 21 is generally a rectangle with a semicircular short side, and the top side of the slider groove 21 also has an arc groove 23 with a larger diameter. The arc convex surface 31 abuts against the arc groove 23. When the lock tongue 33 slides along the edge of the locking tooth groove 14 under the action of the transverse elastic member 4, the compound motion locking block 3 can swing around the semicircular axis.

[0047] In this embodiment, the transverse elastic member 4 is a spring, and a first transverse column is provided on the side of the compound motion lock block 3 away from the lock tongue 33. One end of the spring is sleeved on the first transverse column and presses against the side of the compound motion lock block 3 away from the lock tongue 33. A second transverse column is provided on the groove wall of the lock block groove 21, and the other end of the spring is sleeved on the second transverse column and presses against the groove wall of the lock block groove 21.

[0048] Example 2

[0049] like Figure 1 As shown, the technical solution of Example 1 is applied to a swivel chair, and a lumbar support is provided on the side of the connector 2 away from the locking plate 1. The lumbar support can move up and down with the connector 2, and the lumbar support is hinged to the connector 2. The orientation angle of the lumbar support can be adjusted as needed to make it fit the human waist better.

[0050] The locking plate 1 is fixed on a frame connected to the seat. Two symmetrical slide grooves are vertically arranged on the frame, and corresponding slide rails are also arranged on the connecting body 2, so that the two can move relative to each other in a straight line direction.

[0051] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A lumbar support lifting mechanism, comprising a lumbar support connector (2) that moves linearly up and down relative to a locking plate (1), characterized in that: The lumbar support connector (2) is provided with a locking block groove (21) facing the locking plate (1), and a compound motion locking block (3) is connected to the locking block groove (21) through a transverse elastic member (4) and is supported by the transverse elastic member (4) to perform lifting displacement and swing relative to the locking block groove (21), and a locking groove (11) is provided on the locking plate (1); when the transverse elastic member (4) releases the transverse elastic force, the compound motion locking block (3) and the locking groove (11) cooperate through a concave-convex locking structure, and a first unlocking position (12) is provided at the top of the locking groove (11) to cancel the locking cooperation of the concave-convex locking structure, and an unlocking holding structure is provided between the locking block groove (21) and the compound motion locking block (3) to keep the compound motion locking block (3) in an unlocked state, and a second unlocking position (13) is provided on the bottom side of the locking groove (11) to cancel the holding state of the unlocking holding structure.

2. The lumbar support lifting mechanism according to claim 1, characterized in that: The unlocking and holding structure comprises an unlocking and holding surface 1 (32) provided on a side of the compound motion locking block (3) away from the transverse elastic member (4), and an unlocking and holding surface 2 (22) provided at the bottom of the locking block groove (21), wherein the unlocking and holding surface 1 (32) and the unlocking and holding surface 2 (22) are distributed in the vertical direction.

3. The lumbar support lifting mechanism according to claim 2, characterized in that: The second unlocking holding surface (22) and the second unlocking position (13) are relatively vertically distributed.

4. The lumbar support lifting mechanism according to claim 2, characterized in that: The concave-convex locking structure comprises a locking tongue (33) provided on the composite motion locking block (3) and at least partially extending into the locking groove (11); a plurality of continuously distributed locking tooth grooves (14) are provided on the groove wall of the locking groove (11); and the locking tongue (33) cooperates with any one of the locking tooth grooves (14).

5. The lumbar support lifting mechanism according to claim 4, characterized in that: At least a portion of the locking tongue (33) protrudes from the unlocking retaining surface 1 (32) toward a side away from the transverse elastic member (4).

6. The lumbar support lifting mechanism according to claim 4, characterized in that: The transverse elastic member (4) is a spring, and a first transverse column is provided on a side of the compound motion lock block (3) away from the lock tongue (33), one end of the spring is sleeved on the first transverse column and abuts against a side of the compound motion lock block (3) away from the lock tongue (33), and a second transverse column is provided on the groove wall of the lock block groove (21), and the other end of the spring is sleeved on the second transverse column and abuts against the groove wall of the lock block groove (21).

7. The lumbar support lifting mechanism according to claim 1, characterized in that: The transverse elastic member (4) is in a straight line state when the concave-convex locking structure is locked, and is in an arched state when the concave-convex locking structure cancels the locking and remains in an unlocked state.

8. The lumbar support lifting mechanism according to claim 1, characterized in that: The first unlocking position (12) comprises an inclined unlocking surface (121) and an unlocking abutting surface (122) connected to the top side of the inclined unlocking surface (121), wherein the inclined unlocking surface (121) and the unlocking abutting surface (122) are distributed at an obtuse angle.

9. The lumbar support lifting mechanism according to claim 1, characterized in that: The top side of the compound motion locking block (3) has an arc convex surface (31), the top side of the locking block groove (21) has an arc groove (23), and the diameter of the notch of the arc groove (23) connected to the locking block groove (21) is larger than the diameter of the arc convex surface (31).

10. A swivel chair, characterized in that: The swivel chair includes the lumbar support lifting mechanism according to any one of claims 1 to 9.

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