CN220236441U

CN220236441U - Unidirectional ratchet lifting device and seat

Info

Publication number: CN220236441U
Application number: CN202321248665.5U
Authority: CN
Inventors: 彭汉强; 彭伟鸿
Original assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Current assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-12-26
Anticipated expiration: 2033-05-22

Abstract

The utility model provides a unidirectional ratchet lifting device and a seat, which comprise a mounting frame with a strip-shaped through groove, wherein the strip-shaped through groove is internally provided with a sliding clamping lifting seat, the lifting seat is internally provided with an elastic hinged locking block, one side groove wall of the strip-shaped through groove is provided with a unidirectional ratchet bar, the locking block is convexly provided with unidirectional teeth, the unidirectional teeth and the unidirectional ratchet bar form intermittent tooth meshing connection, a bottom hook locking mechanism is matched between the locking block and the lifting seat, and a guide driving mechanism is matched between the locking block and the mounting frame. The utility model realizes lifting by adopting the one-way ratchet matching, simultaneously utilizes the guiding limit structure to perform fixed-point driving so as to complete the functions of locking the bottom hook and unlocking the high position, adopts an automatic locking switching mode, simplifies the operation, improves the smoothness of switching and improves the use experience. The novel lock has the advantages of simple integral structure, reliable and stable action, increased bottom locking and high-position unlocking functions, expanded use effect and contribution to popularization.

Description

Unidirectional ratchet lifting device and seat

Technical Field

The utility model belongs to the technical field of furniture, and relates to a seat part, in particular to a one-way ratchet lifting device and a seat.

Background

The chair back of the lifting chair can be lifted, has lifting and positioning functions, and can be positioned at various heights. The lifting chair has reasonable structure, convenient use and simple operation, and is suitable for occasions such as schools, families, offices, workshops and the like.

For example, chinese patent literature has disclosed a multifunctional office chair [ chinese patent No.: 201910230156.1 the utility model relates to the technical field of armrests of chairs, in particular to a multifunctional office chair, which comprises a chair keel, an adjustable seat frame and a chair back, wherein the chair keel is in a herringbone shape, the feet of the chair keel extend downwards to form a keel frame seat, the chair back comprises a backrest and an arched waist rest which are arranged separately, the backrest can slide along the ridge direction of the chair keel, the bottom of the adjustable seat frame is provided with a bearing chassis, and the keel frame seat is screwed on one side of the bearing chassis; the adjustable handrail is installed to fossil fragments frame seat both sides, and adjustable handrail includes handrail portion, rotation portion and elevating system, and handrail portion block is in the one end of rotation portion, and the other end of rotation portion is equipped with female end interface, and the one end of elevating system is embedded in fossil fragments frame seat, and the other end of elevating system is equipped with the public end interface of perpendicular to elevating system, and rotation portion passes through female end interface and public end interface cooperation with elevating system and is connected. The utility model has various flexible and adjustable structures, can meet the use requirements under various conditions, and can be used comfortably by users with different body types.

According to the technical scheme, although the rack positioning structure, the lifting teeth and the pressing spring hooks are matched to form the lifting position adjustment, the lifting position adjustment cannot be automatically locked at the lifting limiting position, so that the problems of poor lifting stability and single function are caused.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a one-way ratchet lifting device and a seat, wherein a passive driving structure is additionally arranged at a limit position and is matched with a hook locking structure to realize automatic locking and unlocking.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a one-way ratchet elevating gear, includes the installing frame that has the bar logical groove, be slip joint elevating seat in the bar logical groove, be elastic hinge locking piece in the elevating seat, one side cell wall in bar logical groove sets up one-way ratchet, the locking piece is protruding to establish one-way tooth, one-way tooth with one-way ratchet forms intermittent type formula tooth meshing and is connected, the locking piece with the cooperation sets up end position hook locking mechanism between the elevating seat, the locking piece with the cooperation sets up guiding drive mechanism between the installing frame.

In the unidirectional ratchet lifting device, the lifting seat is provided with the groove cavity by a side face concave, the groove wall of the groove cavity is concavely provided with the long round groove, the length direction of the long round groove is consistent with the length direction of the strip-shaped through groove, the locking block is convexly provided with the rotating shaft, and the rotating shaft stretches into the long round groove to form the composite movable connection of guiding sliding and autorotation.

In the unidirectional ratchet lifting device, the locking block uses the rotating shaft as a central concave groove to form a ring groove, one side of the ring groove is communicated with a positioning groove, the other side of the ring groove is communicated with a swinging groove, the outer end of the swinging groove is open, the groove wall of the mounting groove cavity is connected with the open concave groove of the swinging groove, the main body of the torsion spring is embedded in the ring groove, a straight torsion arm of the torsion spring stretches into the positioning groove to form a fixing mode, and the other straight torsion arm of the torsion spring stretches out of the swinging groove and is abutted to the limiting groove.

In the unidirectional ratchet lifting device, a smooth notch is formed in the mounting groove cavity from one side, the smooth notch faces the unidirectional ratchet bar, so that part of the unidirectional ratchet bar is placed in the smooth notch, and the unidirectional teeth are convexly arranged from the locking block towards the smooth notch.

In the unidirectional ratchet lifting device, the bottom hook locking mechanism comprises a locking hook protruding from the inner wall of the mounting groove cavity, locking hooks are correspondingly protruding from the side edges of the locking blocks, and the locking blocks swing to enable the locking hooks to be hooked with the locking hooks to form fixation.

In the unidirectional ratchet lifting device, the locking hooks are obliquely and convexly arranged from top to bottom, and the locking hooks are provided with acute arc hook tips; the locking hook is arranged in a protruding mode from bottom to top in an inclined mode, the locking hook is provided with an obtuse arc hook tip, an arc groove is concavely formed in the bottom of the obtuse arc hook tip, and the acute arc hook tip is embedded into the arc groove.

In the unidirectional ratchet lifting device, the guiding driving mechanism comprises a guiding chute concavely arranged on the groove wall of the strip-shaped through groove, the guiding chute is arranged on the same side as the unidirectional ratchet bar in parallel, the locking block is convexly provided with a guiding sliding block, and the guiding sliding block extends into the guiding chute to form fitting sliding connection.

In the unidirectional ratchet lifting device, the guide sliding block is obliquely arranged downwards, and the bottom plane of the guide sliding groove reversely pushes against the inclined bottom surface of the guide sliding block to drive the locking block to rotate clockwise by a hook locking angle; the top end plane of the guide sliding groove reversely presses the inclined top surface of the guide sliding block to drive the locking block to rotate anticlockwise by an unlocking angle.

In the unidirectional ratchet lifting device, the first mounting holes are formed in the two ends of the mounting frame, and the second mounting holes are formed in the two ends of the lifting seat.

The seat comprises a seat base, a seat back and the unidirectional ratchet lifting device, wherein the seat base is fixedly connected with a supporting rod, the seat back is sleeved on the supporting rod, the mounting frame is fixedly mounted on the supporting rod, and the lifting seat is fixedly mounted inside the seat back.

Compared with the prior art, the unidirectional ratchet lifting device and the seat have the following beneficial effects:

1. when the unidirectional ratchet is matched to realize lifting, the guiding limit structure is utilized to perform fixed-point driving so as to complete the functions of locking the bottom hook and unlocking the high position, and an automatic locking switching mode is adopted, so that the operation is simplified, the switching smoothness is improved, and the use experience is improved.

2. The novel lock has the advantages of simple integral structure, reliable and stable action, increased bottom locking and high-position unlocking functions, expanded use effect and contribution to popularization.

Drawings

Fig. 1 is a perspective view of the unidirectional ratchet lifting device.

Fig. 2 is a front view of the unidirectional ratchet lifting device.

Fig. 3 is a perspective view of the mounting frame and the lifting seat in the unidirectional ratchet lifting device.

Fig. 4 is a perspective view of the locking block in the unidirectional ratchet lifting device.

In the figure, 1, a mounting frame; 1a, a strip-shaped through groove; 1b, a one-way ratchet bar; 1c, a guide chute; 2. a lifting seat; 2a, a long round groove; 2b, a limit groove; 2c, locking hooks; 3. a locking block; 3a, unidirectional teeth; 3b, a ring groove; 3c, positioning grooves; 3d, swinging the groove; 3e, locking hooks; 3f, a guide slide block; 4. and (3) a torsion spring.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 to 4, this one-way ratchet elevating gear, including the installing frame 1 that has bar logical groove 1a, be slip joint elevating seat 2 in the bar logical groove 1a, be elastic hinge locking piece 3 in the elevating seat 2, one side cell wall that bar logical groove 1a sets up one-way ratchet bar 1b, the protruding one-way tooth 3a of establishing of locking piece 3, one-way tooth 3a forms intermittent type tooth meshing with one-way ratchet bar 1b and is connected, the cooperation sets up the end position hook locking mechanism between locking piece 3 and the elevating seat 2, the cooperation sets up guiding drive mechanism between locking piece 3 and the installing frame 1.

As shown in fig. 3, the lifting seat 2 is provided with a groove cavity by a side surface concave, the groove wall of the groove cavity is concavely provided with a long round groove 2a, the length direction of the long round groove 2a is consistent with the length direction of the strip-shaped through groove 1a, the locking block 3 is convexly provided with a rotating shaft, and the rotating shaft stretches into the long round groove 2a to form a composite movable connection of guiding sliding and autorotation. The rotating shaft drives the locking block 3 to slide along the length direction of the long round groove 2a and also can rotate in the long round groove 2 a. The long circular groove 2a provides the hinge installation of the locking block 3, and simultaneously, the limit of the setting range of the length displacement can be also achieved.

As shown in fig. 1 and 2, the locking block 3 uses the rotating shaft as a center to form a concave ring groove 3b, one side of the ring groove 3b is communicated with a positioning groove 3c, the other side of the ring groove 3b is communicated with a swinging groove 3d, the outer end of the swinging groove 3d is open, the groove wall of the mounting groove cavity is connected with an open concave limiting groove 2b of the swinging groove 3d, the main body of the torsion spring 4 is embedded in the ring groove 3b, a straight torsion arm of the torsion spring 4 stretches into the positioning groove 3c to form fixation, and the other straight torsion arm of the torsion spring 4 stretches out from the swinging groove 3d and is abutted against the limiting groove 2b.

The positioning groove 3c is a strip-shaped groove body, the swinging groove 3d is a flaring groove gradually expanding from inside to outside, and the limiting groove 2b is provided with a groove wall for abutting against the torsion spring 4 straight torsion arm. When the external force drives the locking block 3 to rotate, the two straight torsion arms are pressed to enable the torsion spring 4 main body to generate elastic force, and when the external force disappears, the locking block 3 is driven to rotate and reset through the elastic force of the torsion spring 4. Thereby providing elastic swinging pressure to the lock block 3 by the torsion spring 4.

The mounting groove cavity forms a smooth gap from one side, the smooth gap faces the unidirectional ratchet bar 1b, the local unidirectional ratchet bar 1b is arranged in the smooth gap, and the unidirectional teeth 3a are convexly arranged from the locking block 3 towards the smooth gap. By arranging the unblocked notch, the space for avoiding the meshing of the unidirectional tooth 3a and the unidirectional ratchet bar 1b is provided, so that the whole structure is compact in matching and does not interfere with each other.

The bottom hook locking mechanism comprises a locking hook 2c protruding from the inner wall of the cavity of the mounting groove, a locking hook 3e is correspondingly protruding from the side edge of the locking block 3, and the locking block 3 swings to enable the locking hook 3e to be hooked with the locking hook 2c to form fixation. When the locking block 3 follows the lifting seat 2 to descend to the bottom of the strip-shaped through groove 1a, the locking block 3 is driven to press the torsion spring 4 to rotate, so that the locking hook 3e swings upwards for an angle to be hooked and clamped with the locking hook 2 c.

The locking hook 2c is obliquely and convexly arranged from top to bottom, and the locking hook 2c is provided with an acute arc hook tip; the locking hook 3e is obliquely and convexly arranged from bottom to top, the locking hook 3e is provided with an obtuse arc hook tip, the bottom of the obtuse arc hook tip is concavely provided with an arc groove, and the acute arc hook tip is embedded into the arc groove. The arc hook tip is adopted to enable the locking hook 2c and the locking hook 3e to form sliding contact, so that the locking hook and the locking hook can be hooked or separated smoothly. The acute arc hook tip is favorable for embedding the arc groove, and the obtuse arc hook tip is used for forming a resisting clamping connection with the acute arc hook tip.

As shown in fig. 1 to 3, the guiding driving mechanism comprises a guiding chute 1c concavely arranged on the wall of the strip-shaped through slot 1a, the guiding chute 1c and the unidirectional ratchet bar 1b are arranged on the same side and in parallel, a guiding sliding block 3f is convexly arranged on the locking block 3, and the guiding sliding block 3f stretches into the guiding chute 1c to form fitting sliding connection. When the lifting seat 2 drives the locking block 3 to move up and down, the guide sliding block 3f slides along the guide sliding groove 1c, so as to provide guidance and increase lifting stability.

The guide sliding block 3f is obliquely arranged downwards, and the bottom plane of the guide sliding groove 1c reversely pushes against the inclined bottom surface of the guide sliding block 3f to drive the locking block 3 to rotate clockwise by a hooking locking angle; the inclined top surface of the guide sliding groove 1c reversely presses the guide sliding block 3f to drive the locking block 3 to rotate anticlockwise by an unlocking angle.

When the lifting seat 2 drives the locking block 3 to move downwards, the inclined bottom surface of the guide sliding block 3f continuously moves downwards after contacting the bottom end plane of the guide sliding groove 1c, so that the inclined bottom surface is attached to the bottom end plane, and the locking block 3 is turned around clockwise outwards by an angle through reaction force, so that the locking hook 3e is hooked with the locking hook 2c to form clamping fixation. When the lifting seat 2 drives the locking block 3 to move upwards, the inclined top surface of the guide sliding block 3f continuously moves upwards after contacting the top end plane of the guide sliding groove 1c, so that the inclined top surface is attached to the top end plane, the locking block 3 swings around the anticlockwise inner buckle by a certain angle through the reaction force, and the locking hook 3e is separated from the locking hook 2c to form unlocking.

The two ends of the mounting frame 1 are provided with first mounting holes, and the two ends of the lifting seat 2 are provided with second mounting holes.

The one-way ratchet lifting device has the following action modes:

1. in the process that the lifting seat 2 drives the locking block 3 to move downwards along the strip-shaped through groove 1a, the unidirectional ratchet bar 1b is continuously meshed with the unidirectional tooth 3a, so that the locking block 3 is reciprocally pressed into the torsion spring 4, and the torsion spring 4 is reciprocally and elastically pressed into the locking block 3, so that the unidirectional tooth 3a is meshed with the unidirectional ratchet bar 1b one by one.

2. When the lifting seat 2 drives the locking block 3 to move downwards to the bottom end, the inclined bottom surface of the guide sliding block 3f continuously moves downwards after contacting the bottom end plane of the guide sliding groove 1c, so that the inclined bottom surface is attached to the bottom end plane, and the locking block 3 is turned outwards clockwise by an angle through a reaction force, so that the locking hook 3e is hooked with the locking hook 2c to form clamping fixation.

3. In the process that the lifting seat 2 drives the locking block 3 to move upwards along the strip-shaped through groove 1a, the one-way tooth 3a is separated from the one-way ratchet bar 1b due to the fact that the locking hook 3e is hooked with the locking hook 2 c.

4. When the lifting seat 2 drives the locking block 3 to move up to the top end, the inclined top surface of the guide sliding block 3f continuously moves up after contacting the top end plane of the guide sliding groove 1c, so that the inclined top surface is attached to the top end plane, and the locking block 3 swings around the anticlockwise inner buckle by a certain angle through the reaction force, so that the locking hook 3e is separated from the locking hook 2c to form unlocking.

Compared with the prior art, the unidirectional ratchet lifting device has the following beneficial effects:

Example two

Based on the first embodiment, the distinguishing points of this embodiment are:

a seat comprises a seat base, a seat back and the unidirectional ratchet lifting device, wherein a supporting rod is fixedly connected to the seat base, the seat back is sleeved on the supporting rod, a mounting frame 1 is fixedly arranged on the supporting rod, and a lifting seat 2 is fixedly arranged inside the seat back.

The mounting frame 1 is fixedly mounted on the supporting rod through the first internal penetrating screw of the mounting hole, and the lifting seat 2 is fixedly mounted in the chair back through the second internal penetrating screw of the mounting hole.

Compared with the prior art, the seat has the following beneficial effects:

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although the mounting frame 1 is used more herein; a strip-shaped through groove 1a; a one-way ratchet bar 1b; a guide chute 1c; a lifting seat 2; a long round groove 2a; a limit groove 2b; a catch hook 2c; a lock block 3; unidirectional teeth 3a; a ring groove 3b; a positioning groove 3c; a swing groove 3d; a locking hook 3e; a guide block 3f; torsion spring 4, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Claims

1. The utility model provides a one-way ratchet elevating gear, includes the installing frame that has the bar to lead to the groove, its characterized in that, the bar is led to the inslot and is slip joint elevating seat, be the elastic hinge locking piece in the elevating seat, one side cell wall that the bar led to the groove sets up one-way ratchet, the locking piece protruding one-way tooth of establishing, one-way tooth with one-way ratchet forms intermittent type formula tooth meshing and is connected, the locking piece with the cooperation sets up end hook locking mechanism between the elevating seat, the locking piece with the cooperation sets up guiding drive mechanism between the installing frame.

2. The unidirectional ratchet lifting device of claim 1, wherein the lifting seat is provided with a groove cavity by a side surface concave, a long round groove is concavely arranged on the groove wall of the groove cavity, the length direction of the long round groove is consistent with the length direction of the strip-shaped through groove, a rotating shaft is convexly arranged on the locking block, and the rotating shaft stretches into the long round groove to form a composite movable connection of guiding sliding and autorotation.

3. The unidirectional ratchet lifting device according to claim 2, wherein the locking block is provided with a ring groove in a concave manner by taking the rotating shaft as a center, one side of the ring groove is communicated with a positioning groove, the other side of the ring groove is communicated with a swinging groove, the outer end of the swinging groove is open, the groove wall of the mounting groove cavity is connected with the open concave positioning groove of the swinging groove, the main body of the torsion spring is embedded in the ring groove, a straight torsion arm of the torsion spring extends into the positioning groove to form fixation, and the other straight torsion arm of the torsion spring extends out of the swinging groove and abuts against the positioning groove.

4. The unidirectional ratchet lifting device of claim 2, wherein the mounting slot cavity forms a clear gap from one side, the clear gap faces the unidirectional ratchet bar, so that part of the unidirectional ratchet bar is placed in the clear gap, and the unidirectional teeth are convexly arranged from the locking block towards the clear gap.

5. The unidirectional ratchet lifting device of claim 2, wherein the bottom hook locking mechanism comprises a locking hook protruding from the inner wall of the mounting groove cavity, a locking hook is correspondingly protruding from the side edge of the locking block, and the locking block swings to enable the locking hook to be hooked with the locking hook to form fixation.

6. The unidirectional ratcheting lifting device of claim 5, wherein the capture hook is convexly inclined from top to bottom, the capture hook having an acute arc hook tip; the locking hook is arranged in a protruding mode from bottom to top in an inclined mode, the locking hook is provided with an obtuse arc hook tip, an arc groove is concavely formed in the bottom of the obtuse arc hook tip, and the acute arc hook tip is embedded into the arc groove.

7. The unidirectional ratchet lifting device according to claim 1, wherein the guiding driving mechanism comprises a guiding chute concavely arranged on the wall of the strip-shaped through groove, the guiding chute is arranged on the same side as the unidirectional ratchet bar in parallel, the locking block is convexly provided with a guiding sliding block, and the guiding sliding block extends into the guiding chute to form a fitting sliding connection.

8. The unidirectional ratchet lifting device of claim 7, wherein the guide slide block is arranged obliquely downwards, and the bottom plane of the guide slide groove reversely pushes against the inclined bottom surface of the guide slide block to drive the locking block to rotate clockwise by a hook locking angle; the top end plane of the guide sliding groove reversely presses the inclined top surface of the guide sliding block to drive the locking block to rotate anticlockwise by an unlocking angle.

9. The unidirectional ratcheting lifting device of claim 1, wherein the mounting frame has a first mounting hole at each end and the lifting seat has a second mounting hole at each end.

10. A seat comprising a seat and a back, characterized in that the seat comprises a unidirectional ratchet lifting device as claimed in any one of claims 1 to 9, a support rod is fixedly connected to the seat, the back is sleeved on the support rod, the mounting frame is fixedly mounted on the support rod, and the lifting seat is fixedly mounted inside the back.