CN215190416U

CN215190416U - Seat lifting positioning device and hairdressers' chair

Info

Publication number: CN215190416U
Application number: CN202120623014.4U
Authority: CN
Inventors: 万冬根
Original assignee: Jiangmen Raygea Electronic Technology Co ltd
Current assignee: Jiangmen Raygea Electronic Technology Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-12-17
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a seat lifting and positioning device and a barber chair, wherein the seat lifting and positioning device comprises a driving component, a lifting component and a stroke control strip, and the driving component is used for outputting power; the lifting assembly is connected with the driving assembly; the stroke control strip is relative the lift subassembly interval sets up, be provided with a plurality of positioning sensor on the not high position of stroke control strip, it is a plurality of positioning sensor is located the inboard of stroke control strip and orientation lift subassembly, the stroke control strip with drive assembly electricity is connected, can realize the location of lift stroke, simple structure, simple to operate.

Description

Seat lifting positioning device and hairdressers' chair

Technical Field

The utility model relates to a seat technical field, in particular to seat lift positioner and hairdressers' chair.

Background

The electric lifting seat is generally driven by a motor to realize the reciprocating lifting motion of the seat within a certain range of travel, a travel switch is usually required to be arranged to limit the position or the travel of the mechanical motion, so that the moving machine can automatically stop, position or reciprocate according to a certain position or travel, and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a seat lift positioner and hairdressers' chair can realize the location of lift stroke, simple structure, simple to operate.

In a first aspect, an embodiment of the present invention provides a seat lifting and positioning device, which includes a driving assembly, a lifting assembly and a stroke control bar, wherein the driving assembly is used for outputting power; the lifting assembly is connected with the driving assembly; the stroke control strip is arranged opposite to the lifting assembly at intervals, a plurality of positioning sensors are arranged at different height positions of the stroke control strip, the positioning sensors are positioned on the inner side of the stroke control strip and face the lifting assembly, and the stroke control strip is electrically connected with the driving assembly.

According to the utility model provides a seat goes up and down to fix a position device has following beneficial effect at least: the seat lifting positioning device comprises a driving assembly, a lifting assembly and a stroke control strip, wherein the driving assembly is used for outputting power, the stroke control strip is arranged, a plurality of positioning sensors are arranged at different height positions of the stroke control strip, the lifting assembly can move up and down relative to the stroke control strip after receiving the output power of the driving assembly, the stroke control strip is arranged at intervals relative to the lifting assembly, and the positioning sensors face the lifting assembly, when the lifting assembly rises or falls to a certain height position, the positioning sensors detect the position state of the lifting assembly, a detection signal is sent to the driving assembly through the stroke control strip, the driving assembly stops rotating immediately when receiving the signal, so that the lifting assembly can be positioned at a designated position, the lifting control is stable, the lifting stroke and the position can be detected through the stroke control strip, and the structure is simple, simple to operate, lifting unit moves between a plurality of positioning sensor, and when reacing the assigned position, positioning sensor can carry out accurate detection to lifting unit's shift position to can make lifting unit can realize the location of lift stroke, simultaneously through setting up a plurality of positioning sensor, can realize not co-altitude lift and keep off the position control of position, be favorable to satisfying user's user demand.

According to some embodiments of the utility model, lifting unit includes transmission lead screw, lifter and elevating gear, the lifter is inside hollow structure, the transmission lead screw is worn to locate the lifter, elevating gear connects the transmission lead screw with the lifter, elevating gear's inboard with transmission lead screw threaded connection. The transmission lead screw is arranged in the lifting rod in a penetrating mode, the transmission lead screw is connected with the inner side threads of the lifting gear through the transmission lead screw, the transmission lead screw is tightly connected with the lifting rod, when the driving assembly outputs power, the transmission lead screw receives the power and rotates, the lifting rod is driven to move up and down, and lifting stability is improved.

According to some embodiments of the utility model, the drive assembly includes motor and reducing gear box, the motor with the reducing gear box is connected, the reducing gear box with the transmission lead screw is connected. The driving assembly is used for driving the lifting assembly to move up and down, the reduction gearbox drives the transmission lead screw to rotate through power output of the motor, so that the rotation is more stable, and meanwhile, the transmission lead screw rotates to drive the lifting rod to move up and down, so that the seat is lifted.

According to the utility model discloses a some embodiments, the inside of reducing gear box is provided with drive gear, the output shaft of motor with drive gear connects, the drive gear cover is located the transmission lead screw. Through setting up drive gear, drive gear well meshes with the output shaft and the transmission lead screw of motor respectively, and when drive assembly output power, the output shaft of motor rotated, utilizes drive gear to carry out the transmission of power to drive the transmission lead screw and constantly rotate, drive gear can conduct the power of motor for the transmission lead screw high-efficiently, thereby drives the lifter up-and-down motion, makes the lifting unit can stably go up and down.

According to some embodiments of the utility model, still include first connecting piece and second connecting piece, first connecting piece cover is located the lifter, the upper end of stroke control strip with first connecting piece is connected, the second connecting piece with lifting gear connects, the second connecting piece is located the lower extreme of lifter. Through setting up first connecting piece, be connected the upper end and the first connecting piece of stroke control strip, moreover, the steam generator is simple in structure, high durability and convenient installation, and make the lifter wear to locate first connecting piece, make the lifter can be steadily and smoothly reciprocate for stroke control strip, carry out position detection through setting up the position sensor on the stroke control strip, can realize the location of lift stroke, set up first connecting piece through the lower extreme at the lifter, and be in the same place with lifting gear connection, make the connection cooperation between the part stable, can effective stable structure, thereby be favorable to the smoothness that the lifter reciprocated, improve the stability that the seat goes up and down.

According to some embodiments of the utility model, still include the shell, lifting unit with the stroke control strip set up in the inside of shell, first connecting piece the second connecting piece with lifting gear connects the shell, first connecting piece is provided with first lug, the second connecting piece is provided with the second lug, lifting gear's the outside is provided with the third lug, the inboard of shell be provided with first lug the second lug with third lug assorted draw-in groove. Through set up the shell outside lifting unit and stroke control strip, can protect lifting unit and stroke control strip not influenced by external environment effectively, thereby make the stroke control strip can accurately detect lifting unit's the lift condition, guarantee normal stable work, when lifting unit removes appointed position, can in time transmit locating signal to drive assembly, make drive assembly can in time stop output power, reduce lifting unit and cause the condition of damage because excessively moving, simultaneously through setting up and first lug, second lug and third lug assorted draw-in groove, can make first connecting piece, second connecting piece and lifting gear, it is inseparabler with the cooperation of being connected of shell, be favorable to improving the stability of seat lift positioner structure.

According to some embodiments of the utility model, still include the mounting, the mounting cover is located the shell. Through setting up the mounting to the lower extreme of shell is located to the cover, can guarantee effectively that lifting unit is in the stability of elevating movement, improves user's use and experiences the sense.

According to some embodiments of the invention, the top end of the lifting rod is provided with a mounting lug. Through setting up the installation lug on the top of lifter, on the lifter can be installed with the seat support to the easy to assemble seat support to realize the raising and lowering functions of seat support, convenient to use.

According to some embodiments of the utility model, still include base and footboard, the base is used for the fixed stay, the footboard set up in on the base, the footboard with the drive assembly electricity is connected. Through setting up the base, the base is used for supporting whole seat lift positioner, place the base on ground, the structure is more firm, through set up the footboard on the base, the footboard is connected with the drive assembly electricity, when triggering the electronic button on the footboard, can transmit drive signal to the drive assembly, export power to lifting unit through the drive assembly, thereby realize the elevating movement of seat, conveniently freely adjust the height of seat support, be favorable to satisfying user's multi-functional demand, when positioning sensor detects that lifting unit rises or descends a certain appointed altitude position, can make lifting unit in time fix a position, thereby realize the accurate location of seat in the lift stroke, high durability and convenient use.

In a second aspect, embodiments of the present invention provide a barber chair, including a seat lifting and positioning device as described above in the first aspect.

According to the utility model provides a hairdressers' chair has following beneficial effect at least: the hairdressers' chair comprises the chair lifting positioning device of the first aspect, the chair lifting positioning device comprises a driving assembly, a lifting assembly and a stroke control strip, the driving assembly is used for outputting power, the stroke control strip is arranged, a plurality of positioning sensors are arranged on different height positions of the stroke control strip, the lifting assembly can move up and down relative to the stroke control strip after receiving the output power of the driving assembly, the stroke control strip is arranged at intervals relative to the lifting assembly, and the positioning sensors face the lifting assembly, when the lifting assembly rises or falls to a certain height position, the positioning sensors detect the position state of the lifting assembly, the driving assembly sends a detection signal to the driving assembly through the stroke control strip, and the driving assembly stops rotating immediately when receiving the signal, so that the lifting assembly can be positioned at a designated position, the lifting control is stable, and the lifting stroke and the position can be detected by arranging the stroke control strip, simple structure, simple to operate, lifting unit moves between a plurality of positioning sensor, and when reacing the assigned position, positioning sensor can carry out accurate detection to lifting unit's shift position to can make lifting unit can realize the location of lift stroke, simultaneously through setting up a plurality of positioning sensor, can realize the not co-altitude lift of haircut chair and keep off the position control of position, be favorable to satisfying user's user demand.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a seat lifting and positioning device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a lifting assembly according to some embodiments of the first aspect of the present invention;

fig. 3 is an exploded schematic view of the lift assembly and drive assembly connections of some embodiments of the first aspect of the present invention;

fig. 4 is a schematic structural view of a seat lift positioning device according to some embodiments of the first aspect of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

It should be understood that the positional or orientational descriptions, such as the directions of up, down, front, rear, left, right, etc., are based on the positional or orientational relationships shown in the drawings and are for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Unless otherwise expressly limited, the terms such as set forth, mounted, connected, etc. should be construed broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present disclosure by referring to the specific contents of the technical solutions.

In the description of embodiments of the present disclosure, reference to the description of the terms "one embodiment/implementation," "another embodiment/implementation," or "some embodiments/implementations," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least two embodiments or implementations of the disclosure, and the schematic representations of the terms above do not necessarily refer to the same example embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

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

Referring to fig. 1, a first embodiment of the present invention provides a seat lifting and positioning device 100, which includes a driving assembly 110, a lifting assembly 120, and a stroke control bar 130, where the driving assembly 110 is used for outputting power; the lifting assembly 120 is connected with the driving assembly 110; the stroke control bar 130 is disposed at intervals relative to the lifting assembly 120, a plurality of positioning sensors 131 are disposed at different height positions of the stroke control bar 130, the positioning sensors 131 are located at the inner side of the stroke control bar 130 and face the lifting assembly 120, and the stroke control bar 130 is electrically connected to the driving assembly 110.

The seat lifting and positioning device 100 comprises a driving assembly 110, a lifting assembly 120 and a stroke control bar 130, wherein the driving assembly 110 is used for outputting power, the stroke control bar 130 is arranged, a plurality of positioning sensors 131 are arranged at different height positions of the stroke control bar 130, the lifting assembly 120 can move up and down relative to the stroke control bar 130 after receiving the output power of the driving assembly 110, because the stroke control bar 130 is arranged at intervals relative to the lifting assembly 120, and the positioning sensors 131 face the lifting assembly 120, when the lifting assembly 120 ascends or descends to a certain height position, the positioning sensors 131 detect the position state of the lifting assembly 120, a detection signal is sent to the driving assembly 110 through the stroke control bar 130, the driving assembly 110 stops rotating immediately after receiving the signal, so that the lifting assembly 120 can be positioned at a designated position, the lifting control is stable, and the lifting stroke and the position detection is realized by arranging the stroke control bar 130, simple structure, simple to operate, lifting unit 120 moves between a plurality of positioning sensor 131, and when reacing the assigned position, positioning sensor 131 can carry out accurate detection to lifting unit 120's shift position to can make lifting unit 120 can realize the location of lift stroke, simultaneously through setting up a plurality of positioning sensor 131, can realize not co-altitude lift and keep off the position location control of position, be favorable to satisfying user's user demand.

It should be noted that the positioning sensors 131 are hall sensors, the hall voltage changes with the change of the magnetic field intensity, the stronger the magnetic field, the higher the voltage, the weaker the magnetic field, and the lower the voltage, and by setting on the stroke control bar 130, the stroke control bar 130 can be an integrated PCB, the PCB is electrically connected with the driving component 110 through an outgoing line, the hall sensors play a sensing role in the integrated circuit, and change the magnetic induction intensity through the mechanical relative motion to realize the positioning triggering function, the size is small, and the installation on the seat lifting positioning device 100 is convenient, meanwhile, the positioning sensors 131 are at least two to realize the positioning function of the most basic highest lifting position and the lowest lowering position, in addition, three positioning sensors 131 can be provided, the three positioning sensors 131 are respectively arranged on different heights of the stroke control bar 130 at intervals, and meanwhile, the three positioning sensors 131 can also be arranged at equal intervals, the embodiment of the utility model provides a not be limited to here, positioning sensor 131 can also be equipped with four, five etc, the embodiment of the utility model provides a do not do specific restriction, can realize that the raising and lowering functions of a plurality of different fender position can, can improve user's use and experience, positioning sensor 131 can select line type hall sensor or switch type hall sensor, to positioning sensor 131's quantity and kind, technical field's technical staff can carry out concrete settlement according to the actual application condition.

As shown in fig. 1 and 2, according to some embodiments of the present invention, the lifting assembly 120 includes a driving screw 121, a lifting rod 122 and a lifting gear 123, the lifting rod 122 is an internal hollow structure, the driving screw 121 is inserted into the lifting rod 122, the lifting gear 123 connects the driving screw 121 and the lifting rod 122, and the inner side of the lifting gear 123 is in threaded connection with the driving screw 121. During the lifter 122 is worn to locate by transmission lead screw 121, through setting up lifting gear 123 for transmission lead screw 121 and lifter 122 zonulae occludens are in the same place, and when drive assembly 110 output power, transmission lead screw 121 received power and rotates, thereby drives lifter 122 up-and-down motion, is favorable to improving the stationarity of going up and down.

It should be noted that, the inside of the lifting rod 122 is hollow, the transmission screw rod 121 penetrates through the inside of the lifting rod 122, the lifting gear 123 is connected with the lifting rod 122 and the transmission screw rod 121, the inside of the lifting gear 123 is provided with threads, and the lifting gear 123 can be meshed with the transmission screw rod 121 through the threads, so that the transmission is more efficient, and meanwhile, the space of the whole structure can be effectively saved.

As shown in fig. 1, according to some embodiments of the present invention, the driving assembly 110 includes a motor 111 and a reduction box 112, the motor 111 is connected with the reduction box 112, and the reduction box 112 is connected with the driving screw 121. The driving assembly 110 is used for driving the lifting assembly 120 to move up and down, the motor 111 outputs power, the reduction gearbox 112 drives the transmission screw rod 121 to rotate, the rotation is more stable, meanwhile, the transmission screw rod 121 rotates to drive the lifting rod 122 to move up and down, and therefore the lifting of the seat is achieved. It should be noted that the motor 111 may also directly drive the movement of the lifting assembly 120.

As shown in fig. 1 and 3, according to some embodiments of the present invention, a transmission gear 1121 is disposed inside the reduction box 112, an output shaft of the motor 111 is connected to the transmission gear 1121, and the transmission gear 1121 is sleeved on the transmission screw rod 121. Through the arrangement of the transmission gear 1121, the transmission gear 1121 is respectively well engaged with the output shaft of the motor 111 and the transmission screw rod 121, when the driving assembly 110 outputs power, the output shaft of the motor 111 rotates, the transmission gear 1121 is used for power transmission to drive the transmission screw rod 121 to rotate continuously, the transmission gear 1121 can efficiently transmit the power of the motor 111 to the transmission screw rod 121, so that the lifting rod 122 is driven to move up and down, and the lifting assembly 120 can be lifted stably.

As shown in fig. 1, according to some embodiments of the present invention, the lifting rod 122 is further disposed with a first connecting member 140 and a second connecting member 150, the first connecting member 140 is sleeved on the lifting rod 122, the upper end of the stroke control bar 130 is connected to the first connecting member 140, the second connecting member 150 is connected to the lifting gear 123, and the second connecting member 150 is disposed at the lower end of the lifting rod 122. Through setting up first connecting piece 140, be connected the upper end of stroke control strip 130 with first connecting piece 140, moreover, the steam generator is simple in structure, high durability and convenient installation, and make lifter 122 wear to locate first connecting piece 140, make lifter 122 can be steadily and smoothly reciprocate for stroke control strip 130, carry out position detection through setting up positioning sensor 131 on stroke control strip 130, can realize the location of lift stroke, set up first connecting piece 140 through the lower extreme at lifter 122, and be connected together with lifting gear 123, make the connection cooperation between the part stable, can effective stable structure, thereby be favorable to the smoothness that lifter 122 reciprocated, improve the stability that the seat goes up and down.

As shown in fig. 1 and 4, according to some embodiments of the present invention, the lifting assembly 120 and the stroke control bar 130 are disposed inside the housing 160, the first connecting member 140, the second connecting member 150 and the lifting gear 123 are connected to the housing 160, the first connecting member 140 is provided with the first protrusion 141, the second connecting member 150 is provided with the second protrusion 151, the outer side of the lifting gear 123 is provided with the third protrusion 1231, and the inner side of the housing 160 is provided with the engaging groove 161 matched with the first protrusion 141, the second protrusion 151 and the third protrusion 1231.

By providing the housing 160 outside the lifting assembly 120 and the stroke control bar 130, the lifting assembly 120 and the stroke control bar 130 can be effectively protected from the external environment, thereby enabling the stroke control bar 130 to accurately detect the lifting condition of the lifting assembly 120, ensuring normal and stable operation, when the lifting assembly 120 moves to a designated position, a positioning signal can be transmitted to the driving assembly 110 in time, so that the driving assembly 110 can stop outputting power in time, reduce the damage of the lifting assembly 120 caused by excessive movement, meanwhile, by arranging the locking slot 161 matched with the first projection 141, the second projection 151 and the third projection 1231, the first connecting piece 140, the second connecting piece 150 and the lifting gear 123, the connection fit between the seat lifting and positioning device 100 and the outer shell 160 is tighter, which is beneficial to improving the structural stability of the seat lifting and positioning device 100.

As shown in fig. 4, according to some embodiments of the present invention, the fixing member 170 is further included, and the fixing member 170 is sleeved on the housing 160. Through setting up mounting 170 to the lower extreme of shell 160 is located to the cover, can guarantee effectively that lifting unit 120 is in the stability of elevating movement, improves user's use and experiences the sense.

As shown in fig. 1, according to some embodiments of the present invention, the top end of the lifting rod 122 is provided with a mounting lug 1221. Through setting up installation lug 1221 on the top at the lifter 122, the easy to assemble seat support can be installed the seat support on the lifter 122 in the assembly to realize the raising and lowering functions of seat support, convenient to use.

As shown in fig. 4, according to some embodiments of the present invention, the device further comprises a base 180 and a pedal 190, the base 180 is used for fixing and supporting, the pedal 190 is disposed on the base 180, and the pedal 190 is electrically connected to the driving assembly 110. Through setting up base 180, base 180 is used for supporting whole seat lift positioner 100, place base 180 on ground, the structure is more firm, through set up footboard 190 on base 180, footboard 190 is connected with drive assembly 110 electricity, when triggering the electronic button on footboard 190, can transmit drive signal to drive assembly 110, export power to lift assembly 120 through drive assembly 110, thereby realize the elevating movement of seat, conveniently freely adjust the height of seat support, be favorable to satisfying user's multi-functional demand, when positioning sensor 131 detects lift assembly 120 and rises or descends a certain appointed altitude position, can make lift assembly 120 in time fix a position, thereby realize the accurate positioning of seat in the lift stroke, high durability and convenient use.

It should be noted that the seat lifting and positioning device 100 can be applied to lifting type seats, and can also be applied to equipment and products requiring platform height adjustment.

A second embodiment of the present invention provides a barber chair, comprising the seat lifting and positioning device 100 as described above in the first embodiment.

The barber chair comprises the seat lifting and positioning device 100 as described above in the first aspect, the seat lifting and positioning device 100 comprises a driving assembly 110, a lifting assembly 120 and a stroke control bar 130, the driving assembly 110 is used for outputting power, by arranging the stroke control bar 130, a plurality of positioning sensors 131 are arranged on different height positions of the stroke control bar 130, the lifting assembly 120 can move up and down relative to the stroke control bar 130 after receiving the output power of the driving assembly 110, because the stroke control bar 130 is arranged at intervals relative to the lifting assembly 120, and the positioning sensors 131 face the lifting assembly 120, when the lifting assembly 120 is lifted or lowered to a certain height position, the positioning sensors 131 detect the position state of the lifting assembly 120, and send a detection signal to the driving assembly 110 through the stroke control bar 130, the driving assembly 110 stops rotating immediately when receiving the signal, so that the lifting assembly 120 can be positioned at a designated position, lifting control is steady, realize the detection to lift stroke and position through setting up stroke control strip 130, moreover, the steam generator is simple in structure, high durability and convenient installation, lifting unit 120 moves between a plurality of positioning sensor 131, when arriving the assigned position, positioning sensor 131 can carry out accurate detection to lifting unit 120's mobile position, thereby can make lifting unit 120 can realize the location of lift stroke, simultaneously through setting up a plurality of positioning sensor 131, can realize the not co-altitude lifting of hairdressers ' chair and keep off the position positioning control of position, be favorable to satisfying user's user demand.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims

1. A seat lift positioning device, comprising:

a drive assembly for outputting power;

the lifting assembly is connected with the driving assembly;

the stroke control strip is arranged opposite to the lifting assembly at intervals, a plurality of positioning sensors are arranged at different height positions of the stroke control strip, the positioning sensors are positioned on the inner side of the stroke control strip and face the lifting assembly, and the stroke control strip is electrically connected with the driving assembly.

2. The seat lifting and positioning device as claimed in claim 1, wherein the lifting assembly comprises a transmission screw rod, a lifting rod and a lifting gear, the lifting rod is of a hollow structure, the transmission screw rod is arranged through the lifting rod, the lifting gear is connected with the transmission screw rod and the lifting rod, and the inner side of the lifting gear is in threaded connection with the transmission screw rod.

3. The seat lifting and positioning device as recited in claim 2, wherein the driving assembly comprises a motor and a reduction gearbox, the motor is connected with the reduction gearbox, and the reduction gearbox is connected with the transmission screw rod.

4. The seat lifting and positioning device as recited in claim 3, wherein a transmission gear is disposed inside the reduction gearbox, an output shaft of the motor is connected with the transmission gear, and the transmission screw is sleeved with the transmission gear.

5. The seat lifting and positioning device according to claim 2, further comprising a first connecting member and a second connecting member, wherein the first connecting member is sleeved on the lifting rod, the upper end of the stroke control bar is connected with the first connecting member, the second connecting member is connected with the lifting gear, and the second connecting member is located at the lower end of the lifting rod.

6. The seat lifting positioning device according to claim 5, further comprising a housing, wherein the lifting assembly and the stroke control bar are disposed inside the housing, the first connecting member, the second connecting member and the lifting gear are connected to the housing, the first connecting member is provided with a first protrusion, the second connecting member is provided with a second protrusion, the outer side of the lifting gear is provided with a third protrusion, and the inner side of the housing is provided with a slot matching with the first protrusion, the second protrusion and the third protrusion.

7. The chair lift positioning device of claim 6, further comprising a fastener, wherein the fastener is sleeved on the housing.

8. The seat lifting and positioning device as recited in claim 2, wherein the lifting rod is provided at a top end thereof with a mounting projection.

9. The chair lift positioning device of claim 8, further comprising a base for fixed support and a pedal disposed on said base, said pedal being electrically connected to said drive assembly.

10. A barber's chair comprising a seat lift positioning device as claimed in any one of claims 1 to 9.