CN209733198U

CN209733198U - Headrest waist rest stretching device of functional sofa

Info

Publication number: CN209733198U
Application number: CN201920415612.5U
Authority: CN
Inventors: 潘登
Original assignee: Dule Machinery Technology (changzhou) Co Ltd
Current assignee: Dule Machinery Technology (changzhou) Co Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-12-06
Anticipated expiration: 2029-03-28

Abstract

The utility model belongs to the technical field of functional sofa framework, in particular to a headrest waist rest extension device of a functional sofa, which comprises a mounting framework, a headrest component movably connected with the front end of the mounting framework through a headrest rotating shaft, a waist rest component movably connected with the rear end of the mounting framework through a waist rest rotating shaft, a headrest extension mechanism and a waist rest extension mechanism, wherein the mounting framework comprises two side plates and a connecting plate between the two side plates, the connecting plate is connected with the side plates through an adjusting mechanism to realize the adjustment of the space between the two side plates, the headrest push plate is arranged on the headrest rotating shaft, the output end of the headrest extension mechanism is connected with the headrest push plate, the end of the headrest extension mechanism moves with the waist rest rotating shaft through a headrest support plate, the waist rest push plate is arranged on the waist rest rotating shaft, the output end of the waist rest extension mechanism is connected with the waist rest push plate, the width is adjustable, the thickness is low, and the installation and use of being convenient for, the commonality is strong, has the function of preventing pressing from both sides, simple structure, reduce cost.

Description

Headrest waist rest stretching device of functional sofa

Technical Field

The utility model belongs to the technical field of function sofa skeleton, concretely relates to headrest waist of function sofa leans on stretching device.

Background

In order to improve the comfort, the functional sofa has various adjusting functions, can realize the adjustment of a plurality of positions such as a cushion, a waist rest, a headrest and the like, the adjustment of each position is realized by the adjustment of an adjustable supporting framework in the sofa, the adjustable supporting framework is generally electrically controlled, and the adjustable supporting framework is arranged in the sofa, so the size of the adjustable supporting framework and the structure of the sofa have mutual fit relation, and the fit relation can influence the size, the service performance and the like of the sofa.

For example, the headrest waist support electric stretching device for adjusting the sofa waist support and the headrest is installed inside the sofa to control the stretching adjustment of the sofa headrest and the waist support, the headrest waist support electric stretching device is a combination of various mechanical parts and generally comprises a framework, a headrest component movable at the front end of the framework, a waist support component movable at the rear end of the framework, a headrest stretching control mechanism for driving the headrest component to move and a waist support stretching control mechanism for driving the waist support component to move, the headrest stretching control mechanism and the waist support stretching control mechanism are generally fixed on the framework, a fixing plate for fixing the headrest stretching control mechanism and the waist support stretching control mechanism is required to be arranged at the corresponding position on the framework, so that the structure of the headrest waist support electric stretching device is too complex, the whole thickness is large, the occupied internal space of the sofa is large, and the width of the existing headrest waist support electric stretching device is not adjustable, the headrest waist rest electric stretching device can only be suitable for sofas of one type, and has poor universality and high use cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned defect, the headrest waist that provides the function sofa leans on stretching device, and the width is adjustable, and thickness is low, and the installation of being convenient for is used, has and prevents pressing from both sides the function, and the commonality is strong, simple structure, reduce cost.

The utility model provides a technical scheme that its technical problem adopted as follows:

A headrest waist rest extension device of a functional sofa comprises an installation framework, a headrest assembly movably connected with the front end of the installation framework through a headrest rotating shaft, a waist rest assembly movably connected with the rear end of the installation framework through the waist rest rotating shaft, a headrest extension mechanism driving the headrest assembly to extend, and a waist rest extension mechanism driving the waist rest assembly to extend, wherein the installation framework comprises side plates at two sides and a connecting plate between the side plates, the connecting plate is connected with the side plates through an adjusting mechanism to realize the distance adjustment between the side plates, the headrest rotating shaft is movably connected with the front ends of the side plates, the waist rest rotating shaft is movably connected with the rear ends of the side plates, a headrest push plate is arranged on the headrest rotating shaft, the output end of the headrest extension mechanism is connected with the headrest push plate to push the headrest rotating shaft to rotate to realize the extension of the headrest assembly, and the tail end of the headrest extension mechanism is movably connected with the waist rest rotating shaft through the headrest, the waist is by being equipped with a waist in the pivot and leans on the push pedal, and the waist is connected the waist by the output of extension mechanism and is connected the waist and lean on the push pedal to promote the waist to lean on the pivot to rotate the extension that realizes the waist and lean on the subassembly, the waist leans on extension board and headrest pivot swing joint to realize the waist by the installation that extends the subassembly through the waist by the end of extension mechanism, the headrest waist of function sofa lean on the thickness of extension device to be no longer than 8.5cm, headrest extension mechanism, waist lean on extension mechanism to be and prevent pressing from both sides extension mechanism.

Furthermore, the curb plate be "nearly" style of calligraphy structure, the curb plate body is equipped with a plurality of connecting holes, both ends inwards buckle to form the connecting portion of connecting headrest subassembly or waist by the subassembly around the curb plate, the plate body at curb plate middle part is equipped with the connection otic placode of connecting even board, adjustment mechanism for setting up the connecting bolt on connecting the otic placode, the tip department of even board cooperates the regulation hole of connecting bolt, the adjusting bolt is in the different positions department locking realization both sides interplate interval's of regulation hole adjustment.

Furthermore, the output end of the headrest extending mechanism is movably connected with the headrest push plate, the tail end of the headrest extending mechanism is movably connected with the headrest supporting plate, the headrest supporting plate is rotatably matched with the waist support through the rotating shaft, the output end of the waist support extending mechanism is movably connected with the waist support push plate, and the tail end of the waist support extending mechanism is rotatably matched with the waist support plate.

Furthermore, the headrest extension board be equipped with the waist lean on pivot complex first notch, the waist is leaned on the pivot and is in first notch, first notch and waist lean on the pivot between be equipped with the first cooperation piece of plastics, the waist is leaned on the extension board to be equipped with headrest pivot axle shaft body complex second notch, the headrest pivot is in the second notch, be equipped with the second cooperation piece of plastics between second notch and the headrest pivot.

Furthermore, the headrest stretching mechanism and the waist rest stretching mechanism are both arranged at the bottom sides of the headrest rotating shaft and the waist rest rotating shaft.

Furthermore, the headrest extension mechanism and the waist rest extension mechanism are anti-clamping electric push rods, each anti-clamping electric push rod comprises a shell, a lead screw in the shell, a motor at the rear end of the shell and a push pipe in the shell, the front end of the shell is in sliding fit with a pipe body of the push pipe, the rear part of the push pipe is provided with a push pipe support fixed on the pipe body, the push pipe support is in sliding fit with the inner wall of the shell to provide guiding and auxiliary fixing for the movement of the push pipe, the rear end of the lead screw is in rotatable fit with the rear part of the shell through a bearing, the rear end of the lead screw is provided with a turbine, the output end of the motor is provided with a worm matched with the turbine, the motor is fixed at the rear part of the shell, the push rod is sleeved outside the lead screw, the push rod and the lead screw are coaxial, a lead screw nut is arranged on the lead screw, the front end, the feed screw nut is provided with a convex part which protrudes towards one side and touches the travel switch to limit the travel.

Further, the waist lean on the subassembly include waist backup plate, waist backup plate installation curb plate, the lower extreme and the waist of waist backup plate installation curb plate lean on pivot fixed connection, the waist leans on pivot and installation skeleton rotatable coupling, the upper end rotatable coupling of waist backup plate and waist backup plate installation curb plate, waist backup plate and waist backup plate installation curb plate clearance fit department are equipped with the stop gear of restriction waist backup plate home range, waist is leaned on board installation curb plate lower extreme to be equipped with and to lean on the waist that leans on subassembly home range to limit at the installation skeleton front end and lean on the extension stop gear.

Further, the waist lean on to extend stop gear for the waist lean on board installation curb plate lower extreme plate body to the waist of side bending type one-tenth lean on to extend spacing ear of folding, the waist is by extending spacing ear of folding and contact the installation skeleton in extending and realize that the restriction waist leans on the subassembly to continue the motion, stop gear include the waist lean on limiting plate on the board, the waist lean on the limit structure that corresponds with the limiting plate on the board installation curb plate, the waist lean on the board to realize spacing to the waist lean on the board at the in-process limiting plate of adjustment and limit structure contact.

Further, limit structure lean on the kink of board installation curb plate upper end bending type formation for the waist, the waist leans on the limiting plate middle part of board and the kink swing joint that corresponds, the both sides and the kink contact of limiting plate realize spacingly.

Further, the headrest assembly comprises a headrest plate and a headrest plate mounting side plate, the upper end of the headrest plate mounting side plate is fixedly connected with the headrest rotating shaft, the headrest rotating shaft is movably connected with the lower end of the mounting framework, the headrest plate is detachably connected to the lower end of the headrest plate mounting side plate, and a headrest extension limiting structure capable of limiting extension of the headrest assembly on the mounting framework is arranged at the upper end of the headrest plate mounting side plate in a supporting mode.

The utility model has the advantages that: adopt above-mentioned scheme, the curb plate, even the width of the installation skeleton that the board constitutes is adjustable, it is applicable in the sofa of different styles, therefore, the commonality is strong, usability has been improved, drive headrest subassembly, the waist is installed in the headrest pivot by the electric putter that the subassembly extended, the waist is by in the pivot, the thickness of device has been reduced, the convenience of installation has been strengthened, it occupies to reduce the space, further improvement usability, this kind of mounting means can improve headrest subassembly, the bearing capacity that the subassembly was leaned on to the waist, when improving the practicality, make the atress of part to the transmission of installation skeleton, balanced atress, antifatigue ability reinforcing, increase of service life, anti-pinch function has.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a bottom view of the mounting frame according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of a joint of the connecting plate and the side plate according to an embodiment of the present invention.

Fig. 4 is a schematic view of an installation structure of the electric push rod of the headrest according to an embodiment of the present invention.

Fig. 5 is a schematic view of a fitting structure of the headrest support plate and the lumbar support plate according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a first mating block according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of a joint between a headrest plate and a side plate for mounting the headrest plate according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of the anti-pinch electric push rod according to an embodiment of the present invention.

Fig. 9 is a schematic cross-sectional structure view of the anti-pinch electric push rod in the embodiment of the present invention.

Wherein: the structure comprises a side plate 1, a connecting lug plate 11, a locking bolt 111, a connecting part 12, a connecting plate 2, an adjusting hole 21, a headrest rotating shaft 3, a lumbar support rotating shaft 4, a headrest electric push rod 5, a headrest push plate 51, a headrest support plate 52, a matching block 53, a first notch 521, a lumbar support electric push rod 6, a lumbar support push plate 61, a lumbar support plate 62, a second matching block 63, a second notch 621, a return spring 7, a spring folding lug 71, a return folding lug 72, a headrest plate mounting side plate 8, a headrest extension limiting folding lug 81, a lumbar support plate 9, a lumbar support plate mounting side plate 91, a limiting plate 92, a bending part 93, a lumbar support extension limiting folding lug 94, a shell 10, a lead screw 101, a motor 102, a push pipe 103, a push pipe support 104, a push pipe support 105, a bearing 106, a turbine 107 a lead screw nut.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1: referring to fig. 1-3, the headrest waist rest extension device of the functional sofa comprises a mounting framework, a headrest assembly movably connected with the front end of the mounting framework through a headrest rotating shaft, a waist rest assembly movably connected with the rear end of the mounting framework through a waist rest rotating shaft, a headrest electric push rod for driving the headrest assembly to extend, and a waist rest electric push rod for driving the waist rest assembly to extend, wherein one side of the headrest assembly is the upper end of the mounting framework, one side of the waist rest assembly is the lower end of the mounting framework, the mounting framework comprises side plates 1 and two connecting plates 2 at two sides, the side plates 1 are in a structure like a Chinese character 'ji', a plurality of connecting holes are arranged on the plate body of the side plate 1, a fixing lug is arranged on the plate body at the middle part of the side plate 1, the connecting holes and the fixing lugs are used for fixedly mounting the device, the device is fixedly mounted in the functional sofa, the end parts at two ends of, the side plates are supported, the plate body of the side plate 1 is provided with a connecting ear plate 11 which is bent inwards, the connecting ear plate 11 is provided with a connecting bolt 111, the end part of the connecting plate 2 is provided with an adjusting hole 21 matched with the connecting bolt 111, the locking bolt 111 is matched and locked with different positions of the adjusting hole 21, the distance between the two side plates 1 is adjusted, and the width adjustment of the mounting framework is realized, so that the device is suitable for functional sofas with different types and widths, the universality of the device is improved, the use performance is improved, the plate bodies at the front end and the rear end of the side plate 1 are bent inwards to form a step-shaped connecting part 12 for connecting a headrest component or a lumbar support component, the headrest rotating shaft 3 is in rotatable fit with the connecting part 12 at the front end of the side plate 1, the lumbar support rotating shaft 4 is in rotatable fit with the connecting part 12 at the rear end of the side plate 2, the, headrest electric putter 5 promotes 3 extension movements that rotate the drive headrest subassembly of headrest pivot, the waist leans on electric putter 6 to promote the waist to lean on pivot 5 to rotate the extension movement that drives the waist and lean on the subassembly, connecting portion inwards buckle, for the headrest subassembly, the waist leans on the waist to reserve sufficient connection, the space of extension activity, avoid the waist to lean on the subassembly, the headrest subassembly takes place to interfere with the curb plate at the in-process that extends, the curb plate is "nearly" word column structure of buckling simultaneously, play the effect of strengthening intensity to the curb plate, improve the structural strength of installation skeleton, high durability, the service life is prolonged.

Referring to fig. 4-6, an arc-shaped headrest push plate 51 is arranged on the headrest rotating shaft 3, one end of the headrest push plate 51 is fixed on the headrest rotating shaft 3, the output end of the headrest electric push rod 5 is hinged with the other end of the headrest push plate 51, the tail end of the headrest electric push rod 5 is hinged with a headrest support plate 52, the rear end of the headrest support plate 52 is abutted against the lumbar support rotating shaft 4 and is rotatably matched with the lumbar support rotating shaft 4, the front end of the headrest electric push rod is connected with the headrest rotating shaft through the headrest push plate, and the rear end of the headrest electric push rod is matched with the lumbar support rotating shaft through the headrest support plate to form a front and rear fixing structure, so that the headrest electric push rod is firmly installed, an arc-shaped first notch 521 is arranged at one end of the headrest support plate 52 close to the lumbar support rotating shaft 4, the lumbar support rotating shaft 4 is arranged in the first notch 521, a first matching block 53 is arranged in the, the inner wall of the first notch 521 is embedded in the groove, the headrest push plate and the first matching block are stable and reliably matched, the groove limits the headrest support plate, the headrest support plate and the first matching block are prevented from sliding, the headrest electric push plate is in a normal state, namely, the headrest assembly is in an original position and is not in an extending state, the headrest push plate is arc-shaped, the included angle between the headrest electric push rod and the horizontal plane can be reduced as much as possible by the headrest support plate and is not more than 1 degree, the headrest electric push rod is positioned at the bottom of the connecting plate and is approximately horizontally arranged, the thickness of the device is reduced, the width range of the side plate forms a space for installing and accommodating the headrest electric push rod, the headrest electric push rod is positioned in the installation framework, the overall thickness of the device is greatly reduced, the first notch 521 can play a stable positioning role, the headrest electric push rod is prevented from being fixed and, an arc waist support push plate 61 is arranged on the waist support rotating shaft 4, one end of the waist support push plate 61 is fixedly connected with the waist support rotating shaft 4, the output end of the waist support electric push rod 6 is hinged with the other end of the waist support push plate 61, the rear end of the headrest electric push rod is hinged with a waist support plate 62, the waist support plate 62 is abutted against the headrest rotating shaft 3 and can be in rotatable fit with the headrest rotating shaft 3, an arc second notch 621 is arranged at the corresponding position on the waist support plate 62, a second matching block 63 is arranged in the second notch 621, a groove matched with the inner wall structure of the first notch 621 is arranged on the second matching block 63, the waist support plate is limited by the groove, the waist support plate and the second matching block are prevented from sliding, the matching stability is improved, the waist support electric push rod and the headrest electric push rod are arranged in parallel, the end parts of the headrest electric push rod and the waist support electric push rod are respectively fixed or limited by the headrest, the headrest electric push rod and the waist rest electric push rod are both arranged at the bottom sides of the headrest rotating shaft and the waist rest rotating shaft, so that the effective firm installation of the headrest electric push rod and the waist rest electric push rod is realized, the arc-shaped headrest push plate, the waist rest push plate, the headrest supporting plate and the waist rest supporting plate form an installation structure, so that the included angle between the headrest electric push rod and the horizontal plane is possibly reduced and is not more than 1 degree, the integral thickness of the device is greatly reduced, the thickness of the headrest waist rest stretching device of the functional sofa is controlled within 8.5cm, the headrest push plate is bent in an arc shape from the headrest rotating shaft to the lower part of one side of the waist rest rotating shaft, on one hand, the headrest electric push rod is used as a pushing piece for pushing the headrest rotating shaft to rotate, on the other hand, the headrest electric push rod is used as an extension section, on the premise of pushing the headrest component to stretch, the, combine headrest electric putter's self angle change, by original and curb plate parallel form, along with the extension of output, self slope, reduce the required space of self state change, the required space of subassembly extension reduces, whole thickness is little, be convenient for and various sofa cooperation, improve the commonality, the waist is leaned on the push pedal and is leaned on by the waist to the plate that headrest pivot downside is arc bending, its effect principle is the same with headrest push pedal effect principle, reduce the waist and lean on electric putter's stroke, space occupies when reducing the effect.

The output end of a headrest electric push rod 5 extends out to push a headrest push plate 51 to swing so as to drive a headrest rotating shaft 3 to rotate, and then extension of a headrest component is realized, the output end of the same waist-leaning electric push rod extends out to push a waist-leaning push plate to swing so as to drive a waist-leaning rotating shaft to rotate so as to realize extension of the waist-leaning component, both ends of the headrest electric push rod are hinged, when the headrest electric push rod works, the self state of the headrest electric push rod can be correspondingly changed so as to realize smooth headrest extension action, the headrest electric push rod 5 is in work, the rear end of the headrest electric push rod is abutted against the waist-leaning rotating shaft through the headrest push plate, when a large load or a load is increased, the stress on the headrest electric push rod can be directly decomposed to the waist-leaning rotating shaft through the headrest push plate, the stress is shared by the waist-leaning rotating shaft, the stress is relieved, the bearing, the first matching block 53 made of plastic material enables smooth matching between the headrest support plate and the lumbar support rotating shaft to achieve the effects of noise reduction and lubrication, and avoids abrasion and noise caused by direct contact of metal parts, on the other hand, the contact area is increased, and the force on the headrest electric push rod is rapidly and directly and uniformly dispersed on the lumbar support rotating shaft, in addition, the headrest push plate has a certain buffering effect, the stress of the headrest push plate is prevented from being suddenly increased and deformed, the force side on the lumbar support rotating shaft is transmitted to the side plate and then transmitted to the mounting framework, the mounting framework shares the stress of the headrest component, the bearing capacity of the device is improved, the service performance is improved, the balanced stress is enhanced, the anti-fatigue capacity is enhanced, the service life is prolonged, the output end of the lumbar support electric push rod extends out and then pushes the lumbar support push plate to swing, so that the lumbar support rotating shaft is driven to rotate, and the extension movement of the, the power that electric putter was leaned on to the waist is passed through the waist and is leaned on the extension board and transmit to the headrest pivot, pass on to the installation skeleton again, share electric putter's atress on the whole, improve electric putter's bearing capacity, avoid the push pedal to warp, improve the waist and lean on the subassembly, the bearing capacity of headrest subassembly, second cooperation piece 63 makes the waist lean on electric putter's power to the better transmission of headrest pivot, avoid mutual wearing and tearing simultaneously, increase of service life, headrest extension board 52, the waist leans on the extension board 62 to be close to the tip of even board and can be connected with even board, supplementary to headrest electric putter, the waist leans on electric putter's fixed, make the electric putter transmission to the installation skeleton that the power is better simultaneously, the whole atress of sharing, improve fatigue resistance, and prolonged service life.

Referring to fig. 1 and 7, the headrest assembly includes a waist support plate 9 and a waist support plate mounting side plate 91, the lower end of the waist support plate mounting side plate 91 is fixedly connected with a waist support rotating shaft 4, the waist support rotating shaft 4 is rotatably matched with the rear end of the side plate 1, the waist support plate 9 is rotatably matched with the upper end of the waist support plate mounting side plate 91, a limiting plate 92 movably matched with the waist support plate mounting side plate 91 is arranged at the end of the waist support plate 9, the limiting plate 92 is formed by bending the end of the waist support plate 9, the limiting plate 92 is arc-shaped, a step-shaped bent portion 93 formed by bending the front end of the waist support plate mounting side plate 91 is movably connected with the middle portion of the limiting plate 92 corresponding to the bent portion 93, the two sides of the arc-shaped limiting plate 92 are contacted with the step surface of the bent portion 93 to form a limit for the waist support plate 9, the waist support plate can be automatically rotatably adjusted, the plate body at the lower end of the waist back plate mounting side plate 91 is bent towards one side to form a waist back extension limiting folding ear 94, the waist back extension limiting folding ear 94 can contact the connecting part of the side plate in extension to limit the further movement of the waist back plate mounting side plate and achieve the limiting purpose, in the process of pushing the waist back plate mounting side plate to extend, because the waist back plate is stressed, in the process of rotating and adjusting the waist back plate mounting side plate, the waist back plate can automatically rotate to enable the waist back plate to form the optimal supporting angle for a human body and improve the comfort, the matching of the limiting plate 92 and the bending part 93 limits the angle adjusting range of the waist back plate, the adjustment transition is avoided, the safety and the comfort are improved, the headrest assembly comprises a headrest plate (not marked in the figure), the headrest plate mounting side plate 8, the headrest plate is detachably connected to the upper end of the headrest plate mounting side plate 8, the lower end of a side plate 8 for installing a headrest plate is fixedly connected with a rotating shaft 3 of the headrest, the rotating shaft 3 of the headrest is movably connected with the upper end of a side plate 1, the headrest plate is detachably connected with the lower end of the side plate 8 for installing the headrest plate, the lower part of the side plate 8 for installing the headrest plate is provided with a headrest extending limiting folding lug 81 which can abut against a connecting part at the upper end of the side plate to limit the extension of a headrest assembly, the headrest extending limiting folding lug 81 is formed by bending a plate body at the corresponding part of the side plate 8 for installing the headrest plate, all the plates are formed by stamping and have high production efficiency, the limiting structure is formed by bending and is convenient to produce, the production efficiency is improved, compared with the existing electric push rod installation structure, the device does not need an electric push rod installation structure, saves parts, reduces weight and reduces cost, and the side plates, the connecting plates, the headrest plate, the, the side plate 1 is provided with a reset spring 7 which enables the headrest plate and the waist rest plate to reset after being extended, the bottom of the middle part of the side plate 1 is provided with a spring folding lug 71 for installing the reset spring 7, the bottom of the waist rest plate installation side plate 91 and the headrest plate installation side plate 8, which is close to the side plate connecting part, is provided with a reset folding lug 72, the other end of the reset spring 7 is connected with the reset folding lug 72, after the waist rest assembly and the headrest assembly are extended, the reset spring 7 is stretched, when the waist rest assembly and the headrest assembly lose the thrust of an electric push rod, the reset spring 7 retracts to drive the waist rest assembly and the headrest assembly to reset, the side plate is provided with four reset springs which are divided into two groups, each group is correspondingly responsible for resetting the waist rest assembly and the waist rest assembly, one end parts of the two groups of reset springs are connected to the middle part of the side plate, so as to promote the, the both sides that two springs of every group distribute, distribute the equilibrium, make the waist lean on smooth-going stable the reseing of subassembly, headrest subassembly, in addition, this device focus is stable, convenient to use.

Referring to fig. 8 and 9, the headrest electric push rod 5 and the lumbar electric push rod 6 are anti-pinch electric push rods, each of which comprises a housing 10, a screw rod 101 in the housing 10, a motor 102 at the rear end of the housing 10, and a push tube 103 in the housing 10, wherein the front end of the housing 10 is in sliding fit with a tube body of the push tube 103, a push tube support 104 fixed on the tube body is arranged at the rear part of the push tube 103, a groove for fixing the push tube support 104 is arranged at the rear part of the push tube 103, the push tube support 104 is embedded in the groove, the housing 10 is a special tube, the push tube support 104 is provided with a plurality of matching parts protruding outwards, matching grooves extending along the length direction of the inner wall of the housing and matched with the matching parts are arranged at positions corresponding to the inner wall of the housing 10, the matching parts are in sliding fit with the matching grooves, the push tube is guided during the forward and backward movement of the push tube 103 and forward movement, and backward movement functions as an auxiliary fixing the push tube, the moving stability of the push tube, the rear end of the screw rod 101 is provided with a worm wheel 106 which is fixedly connected with the screw rod, the output end of the motor 102 is provided with a worm matched with the worm wheel 106, the motor 102 is fixed at the rear part of the shell 10, the screw rod 101 is driven to rotate by the rotation of the motor 102 through the meshing transmission of the worm and the worm wheel, the push tube 103 is sleeved outside the screw rod 101, the push tube 10 and the screw rod 101 are coaxial, the screw rod 101 is provided with a screw rod nut 107, the front end of the screw rod nut 107 abuts against the rear end surface of the push tube 103 to push the push tube 103 to move forwards, the front end surface of the screw rod nut 107 is provided with a boss which is convex forwards and has an outer diameter smaller than that of the screw rod nut, the front end of the screw rod nut is in a step shape, the boss extends into the rear end of the push tube 10, the boss can improve the pushing stability of the push tube, the boss is in movable, meanwhile, the screw nut is separated from the rear end of the push pipe, the push pipe is fixed differently, the headrest push plate and the waist rest push plate corresponding to the front end of the push pipe are connected, in the process of resetting the headrest assembly and the waist rest assembly, the reset spring plays a reset role, once foreign matters exist at the headrest assembly and the waist rest assembly, the motor continues to rotate reversely, the screw nut moves reversely and is separated from the push pipe, the push pipe is temporarily positioned, clamping is prevented, when the foreign matters disappear, the reset spring continues to act, the waist rest assembly and the headrest assembly reset, the push pipe is driven to reset at the same time, the clamping prevention function is realized, two travel switches limiting the reciprocating travel of the screw nut are arranged at the position corresponding to the side edge of the screw rod in the shell, and a convex part which touches the travel switch to one side to limit the travel.

Example 2: this example differs from example 1 in that: the installation stores pylon includes the extension pole between both sides curb plate, and the extension pole is two-way extension, and the extension pole setting is between both sides curb plate, and the tip and the curb plate inner wall fixed connection of extension pole realize the adjustment of installation skeleton width through the interval between the extension volume control volume curb plate of adjustment extension pole.

Example 3: this example differs from example 1 in that: the installation stores pylon includes sleeve pipe, the connecting rod between both sides curb plate, and sleeve pipe, connecting rod in pairs set up between the curb plate, connecting rod one end and curb plate inner wall rotatable coupling, and the other end is equipped with the external screw thread, sheathed tube one end and the interior wall connection of opposite side curb plate, and the sheathed tube other end realizes the support to the curb plate with the external screw thread screw-thread fit of connecting rod, constitutes the installation skeleton, realizes the width adjustable of installation skeleton through screw-thread fit simultaneously.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.

Claims

1. A headrest waist rest extension device of a functional sofa comprises a mounting framework, a headrest assembly movably connected with the front end of the mounting framework through a headrest rotating shaft, a waist rest assembly movably connected with the rear end of the mounting framework through the waist rest rotating shaft, a headrest extension mechanism driving the headrest assembly to extend, and a waist rest extension mechanism driving the waist rest assembly to extend, and is characterized in that the mounting framework comprises side plates on two sides and a connecting plate between the side plates, the connecting plate is connected with the side plates through an adjusting mechanism to realize the adjustment of the distance between the side plates, the headrest rotating shaft is movably connected with the front ends of the side plates, the waist rest rotating shaft is movably connected with the rear ends of the side plates, a headrest push plate is arranged on the headrest rotating shaft, the output end of the headrest extension mechanism is connected with the headrest push plate to push the headrest rotating shaft to rotate to realize the extension of the headrest assembly, and the tail end of the headrest extension mechanism is movably connected with the waist rest rotating shaft through, the waist is by being equipped with a waist in the pivot and leans on the push pedal, and the waist is connected the waist by the output of extension mechanism and is connected the waist and lean on the push pedal to promote the waist to lean on the pivot to rotate the extension that realizes the waist and lean on the subassembly, the waist leans on extension board and headrest pivot swing joint to realize the waist by the installation that extends the subassembly through the waist by the end of extension mechanism, the headrest waist of function sofa lean on the thickness of extension device to be no longer than 8.5cm, headrest extension mechanism, waist lean on extension mechanism to be and prevent pressing from both sides extension mechanism.

2. The headrest lumbar support extension device of the functional sofa as claimed in claim 1, wherein the side plate is of a structure like a Chinese character ji, the plate body of the side plate is provided with a plurality of connecting holes, the front and rear ends of the side plate are bent inward to form a connecting portion for connecting the headrest assembly or the lumbar support assembly, the plate body in the middle of the side plate is provided with a connecting ear plate for connecting the connecting plate, the adjusting mechanism is a connecting bolt arranged on the connecting ear plate, the end portion of the connecting plate is matched with the adjusting hole of the connecting bolt, and the connecting bolt is locked at different positions of the adjusting hole to adjust the distance between the two side plates.

3. The headrest lumbar support extension device of the functional sofa according to claim 1, wherein the output end of the headrest extension mechanism is movably connected with the headrest push plate, the end of the headrest extension mechanism is movably connected with the headrest support plate, the headrest support plate is rotatably engaged with the lumbar support rotating shaft, the output end of the lumbar support extension mechanism is movably connected with the lumbar support push plate, and the end of the lumbar support extension mechanism is rotatably engaged with the lumbar support plate.

4. The headrest lumbar support extension device of the functional sofa of claim 3, wherein the headrest support plate is provided with a first notch engaged with the lumbar support shaft, the lumbar support shaft is disposed in the first notch, a first engaging block made of plastic is disposed between the first notch and the lumbar support shaft, the lumbar support plate is provided with a second notch engaged with the shaft body of the headrest shaft, the headrest shaft is disposed in the second notch, and a second engaging block made of plastic is disposed between the second notch and the headrest shaft.

5. The headrest lumbar support extension device of any one of claims 1 and 3, wherein the headrest extension mechanism and the lumbar support extension mechanism are both disposed at the bottom side of the headrest rotation shaft and the lumbar support rotation shaft.

6. The headrest waist rest extension device of the functional sofa according to claim 1, wherein the headrest extension mechanism and the waist rest extension mechanism are anti-pinch electric push rods, each anti-pinch electric push rod comprises a shell, a screw rod in the shell, a motor at the rear end of the shell and a push pipe in the shell, the front end of the shell is in sliding fit with a pipe body of the push pipe, the rear part of the push pipe is provided with a push pipe support fixed on the pipe body, the push pipe support is in sliding fit with the inner wall of the shell to provide guidance and auxiliary fixation for the movement of the push pipe, the rear end of the screw rod is in rotatable fit with the rear part of the shell through a bearing, the rear end of the screw rod is provided with a turbine, the output end of the motor is provided with a worm matched with the turbine, the motor is fixed at the rear part of the shell, the push rod is sleeved outside the screw rod, the push rod and the screw rod are coaxial, two travel switches for limiting the reciprocating travel of the screw rod nut are arranged in the shell corresponding to the side edge of the screw rod, and a convex part which protrudes to one side and touches the travel switches to limit the travel is arranged on the screw rod nut.

7. the headrest waist rest extension device of the functional sofa according to claim 1, wherein the waist rest assembly comprises a waist rest plate and a waist rest plate mounting side plate, the lower end of the waist rest plate mounting side plate is fixedly connected with the waist rest rotating shaft, the waist rest rotating shaft is rotatably matched with the mounting framework, the waist rest plate is rotatably matched with the upper end of the waist rest plate mounting side plate, a limiting mechanism for limiting the range of motion of the waist rest plate is arranged at the movable matching position of the waist rest plate and the waist rest plate mounting side plate, and a waist rest extension limiting mechanism for limiting the range of motion of the waist rest assembly by abutting against the front end of the mounting framework is arranged at the lower end of the waist rest plate mounting side plate.

8. The headrest waist rest extension device of the functional sofa according to claim 7, wherein the waist rest extension limiting mechanism is a waist rest extension limiting folding lug formed by bending a lower end plate body of a waist rest plate installation side plate towards a side edge, the waist rest extension limiting folding lug contacts with an installation framework in extension to limit the waist rest assembly to move continuously, the limiting mechanism comprises a limiting plate on the waist rest plate and a limiting structure corresponding to the limiting plate on the waist rest plate installation side plate, and the limiting plate and the limiting structure contact to limit the waist rest plate in the adjustment process of the waist rest plate.

9. The headrest waist rest extension device of the functional sofa according to claim 8, wherein the limiting structure is a bending part formed by bending the upper end of the side plate of the waist rest board, the middle part of the limiting board of the waist rest board is movably connected with the corresponding part of the bending part, and the two sides of the limiting board are contacted with the bending part to realize limiting.

10. The headrest waist rest extension device of the functional sofa according to claim 1, wherein the headrest assembly comprises a headrest plate and a headrest plate mounting side plate, the upper end of the headrest plate mounting side plate is fixedly connected with the headrest rotating shaft, the headrest rotating shaft is movably connected with the lower end of the mounting framework, the headrest plate is detachably connected with the lower end of the headrest plate mounting side plate, and a headrest extension limiting structure capable of limiting the extension of the headrest assembly by abutting against the mounting framework is arranged at the upper end of the headrest plate mounting side plate.