KR101485295B1 - Back massage device for massage chair - Google Patents

Abstract

Disclosed is a back massage device for a massage chair. The back massage device for a massage chair of the present invention comprises a seat frame arranged in a seat of a massage chair; a back frame arranged in a back part of the massage chair; and a three-dimensional hitting massage module including multiple internal massage rollers and multiple external massage rollers operated independently from the internal massage rollers and performing the three-dimensional massage, and sequentially massaging all the back, hip, and lower part of the thigh of a user while reciprocating.

Description

{Back massage device for massage chair}

The present invention relates to a massage appliance for a massage chair, and more particularly, it is possible to massage both the buttocks and the lower thighs through an efficient structure of an integrated type. Particularly, Which is capable of improving the efficiency of the whole body massage as a single structure.

BACKGROUND ART Recently, exercise equipment such as a running machine and the like which are used to maintain or promote the health and fitness of the person in the home or the health club or to relieve fatigue and relieve stress are developed and widely used in real life.

In particular, there is a growing demand for devices that can provide massages because of the demand for unwinding muscles and relieving fatigue and stress through massage.

Massage is one of the medical aids that help the blood circulation and relieve fatigue by sweeping, nipping, pressing, pulling, tapping or moving with a hand or a special instrument.

Massage chairs are widely used as devices or devices for performing massage by mechanical devices.

In recent years, the importance of health has been increasing, and massage chair has been increasing in popularity.

A typical massage chair includes a massage unit for directly massage the user's body and a control unit for controlling the operation of the massage unit. Currently, various kinds of massage chairs have been developed and marketed on the market.

On the other hand, most of the conventional massage chairs currently in widespread use are those in which the massage rollers are mounted on the rails for ascending and descending, and then the massage is performed locally by moving the motor up and down along the user's body, It is common.

In the case of this type of massage chair, the efficiency of the whole body massaging to the bottom of the buttocks and thighs, including especially the efficiency of the whole body massage is lowered because it is only the massage while hitting the back with the massage roller.

However, it is anticipated that it would not be desirable to apply the massage and massage device to the back of the back, buttocks and thighs individually, and it would be a cause of trouble due to the control problem. It is necessary to develop the structure of massage appliance for massage.

Korea Patent Office Application No. 20-2003-0002354 Korea Patent Office Application No. 10-2007-0106485

An object of the present invention is to provide a massage device capable of massaging both the buttocks and the lower thighs through the efficient structure of the integrated type and improving the efficiency of the whole body massage by performing a three- The present invention provides a massage appliance for a massage.

The above object can be achieved by a chair comprising: a seat frame disposed within a seat of a massage chair; A backrest frame connected to the seat frame and disposed in a backrest of the massage chair; And a plurality of external massage rollers disposed externally of the internal massage rollers and independently operating with the internal massage rollers to conduct massaging in a three-dimensional manner, wherein a plurality of external massage rollers are provided on the back, Wherein the massage massage module includes a three-dimensional massage massage module that sequentially and reciprocally moves all of the massage massage modules.

The plurality of inner massage rollers and the plurality of external massage rollers may be arranged in two pairs, respectively.

The diameter of the external massage roller may be larger than that of the internal massage roller, but the striking surface may be formed narrow.

The three-dimensional impact massage module includes: a roller shaft integrally connecting the inner massage rollers and the external massage rollers; And a plurality of inner massaging rollers and a plurality of outer massaging rollers, each of which is connected to the roller shaft such that when the roller shaft is rotated, the inner massaging rollers and the external massaging rollers eccentrically rotate on the roller shaft And may include an eccentric connector.

A bearing may be interposed in the eccentric connector.

The massaging massaging module comprising: a plurality of vibrating bars each vibrating the inner massaging rollers and the external massaging rollers in place; And a bar driving unit for driving the plurality of vibrating bars.

The three-dimensional impact massage module may further include an elastic member elastically supporting the external massage rollers.

And a module reciprocating unit provided in the left frame, the backrest frame, and the module for reciprocating massage, and the module reciprocating unit for reciprocating the stereoscopic impact massaging module to the left and right backrest frames by a gear system.

Wherein the module reciprocating unit includes rack gears provided on both sides of the side frames of the left and right frame and across the entire area of the left frame and the backrest frame; A pinion gear which is moved while being meshed with the rack gear and connected to the three-dimensional impact massage module at one side; And a gear motor for rotating the pinion gear.

Wherein the module reciprocating portion is connected to the pinion gear and is configured so as to be capable of moving in a rolling direction from the inside of the gear mounting channel, And a wheel member.

An input unit for inputting an input signal for operation of the module reciprocating unit; And a controller for controlling the operation of the module reciprocating unit based on an input signal of the input unit.

And a plurality of reinforcement frames coupled to the seat frame and the backrest frame by positions to reinforce the seat frame and the backrest frame, and the upper end of the backrest frame may protrude forward by a predetermined distance from the rest of the frame .

According to the present invention, it is possible to massage both the buttocks and the lower thighs through the efficient structure of the integrated type. In particular, by performing the three-dimensional striking from the simple batting massage method, There is an effect that can be.

1 is a perspective view of a massage chair to which an iso massage apparatus according to a first embodiment of the present invention is applied.
Fig. 2 is a perspective view of the massage device for massage of the present invention shown in Fig. 1. Fig.
3 is an enlarged view of the area A in Fig.
Fig. 4 is a schematic side view of the operation of Fig. 3. Fig.
5 is a schematic frontal structural view of a three-dimensional batting massage module.
6 is an operation diagram of Fig.
7 is a control block diagram of a massage massage device for a massage.
FIG. 8 is a schematic front view of a stereoscopic impact massaging module in a massage massage applicator according to a second embodiment of the present invention. FIG.
FIG. 9 is a schematic front view of a stereoscopic impact massaging module in a massage massage applicator according to a third embodiment of the present invention.
FIG. 10 is a schematic front view of a stereoscopic impact massaging module in a massage massage applicator according to a fourth embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

The meaning of the terms described in the present invention should be understood as follows.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Embodiments of the present invention will now be described in detail with reference to the drawings. In the description of the embodiments, the same components are denoted by the same reference numerals.

1 is a perspective view of a massage chair to which an iso massage apparatus according to a first embodiment of the present invention is applied.

Referring to this figure, a massage chair 1 to which a massage massage device 100 (see FIG. 2) according to the present embodiment is applied includes a seat 2, a backrest 4, and a leg 5 .

The seat (2) forms a seat for a user to receive massage. It can be wrapped in a shell with a fluffy cushion. A leg portion 6 for supporting the seat 2 is provided on the lower portion of the seat 2 and a pair of armrest portions 3 are provided on both sides of the seat 2.

The backrest portion 4 is a part connected to the backrest 2 in a standing state, and constitutes a part where the user expects the back.

The leg portion 5 is a portion where a user sitting on the platform 2 inserts both legs. It is also possible to massage the legs through the legs 5.

In this structure, the massage massage appliance 100 (see Fig. 2) of the massage chair according to the present embodiment is provided in the seat 2 and the backrest 4 so that the hips, I am able to massage all the lower thighs.

Hereinafter, the structure and operation of the stereoscopic impact massaging module 10 according to the present embodiment will be described with reference to FIGS. 2 to 7. FIG.

Fig. 2 is a perspective view of the massage isostatic apparatus of Fig. 1, Fig. 3 is an enlarged view of the area A of Fig. 2, Fig. 4 is a schematic side view of Fig. Fig. 6 is an operation diagram of Fig. 5, and Fig. 7 is a control block diagram of the massage device for massage.

Referring to these drawings, the massage massage appliance 10 according to the embodiment of the present invention can massage both the buttocks and the lower thighs through the efficient structure of the integrated type, The backrest frame 143, the three-dimensional impact massage module 100, and the module reciprocating movement unit 160. In the present embodiment, the three- .

The seat frame 141 is a frame disposed in the seat 2 of the massage chair 1 of Fig. 1 described above, and supports a load of a user who wants to receive massage.

The backrest frame 143 is a frame arranged in the backrest portion 4 of the massage chair 1 of Fig. 1 described above, and supports the back of the user who wants to receive massage. In the figure, the left frame 141 and the back frame 143 are in the form of a frame, that is, a frame.

In this embodiment, the seat frame 141 and the backrest frame 143 are made of an integral structure. That is, the metal frame is bent or bent in a nonlinear shape so that the seat frame 141 and the backrest frame 143 are integrated.

When the seat frame 141 and the backrest frame 143 are integrated with each other as in the present embodiment, there is an advantage in that the manufacture is convenient and the strength is excellent. Particularly, the seat frame 141 and the backrest frame 143 may be integrated so that the angle between the seat frame 141 and the backrest frame 143 ranges from about 100 to 130 degrees as shown in FIG.

As described above, since the seat frame 141 and the backrest frame 143 are made of frame frames, a plurality of reinforcing frames 146 may be provided for reinforcing the strength of the frames.

The reinforcing frames 146 serve to reinforce the seat frame 141 and the backrest frame 143 by being joined to the seat frame 141 and the backrest frame 143 by position.

Of course, in addition to this role, the reinforcing frames 146 may also be used when the seat frame 141 and the backrest frame 143 are covered with cloth or leather covering to form the seat 2 and the backrest 4, It also plays a role in supporting the leather cloth.

4, the upper end 143a of the backrest frame 143 is projected forward by a predetermined distance L, for example, several to several tens of millimeters (mm), from the remaining area. That way, you can support your head in a stable way, doubling the effect of massage.

As shown in FIGS. 1 and 2, a channel 145 for installing a 'gear' gear for mounting a rack gear 161 is provided on both sides of the side frames of the seat frame 141 and the backrest frame 143.

Meanwhile, as described above, since the massage roller (not shown) applied to the previous massage chair has a simple upward and downward motion only on the backrest frame 143 supporting the back of the user, the massage can be performed, I could not massage the bottom of my thigh, including my buttocks.

However, the three-dimensional massage massage module 100 applied to the present embodiment sequentially reciprocates the user's back, buttocks, and lower thigh parts as shown in FIG.

The massaging massage module 100 according to the present embodiment includes a plurality of inner massage rollers 111 and a plurality of inner massage rollers 111 disposed outside the inner massage rollers 111 and operating independently of the inner massage rollers 111, And has a plurality of external massage rollers 112 for carrying massage and serves to massage the user's back, buttocks and lower thighs sequentially in a reciprocating motion.

As described above, the three-dimensional style batting massage module 100 can perform three-dimensional striking by a plurality of inner massage rollers 111 and a plurality of external massage rollers 112, so that the user's back, Massage can be done sequentially, which can improve overall massage efficiency.

The steric hitting massage module 100, which performs this role, includes a module body 101. All of the structures for supporting and driving the inner massage rollers 111 and the external massage rollers 112, including the module 100, can be mounted and moved together.

In the case of this embodiment, the inner massage rollers 111 are arranged in two rows in pairs. At this time, the separation distances between the upper and lower internal massage rollers 111 may be different from each other.

The external massage rollers 112 are also arranged in two rows in pairs. At this time, the diameter of the external massage roller 112 is larger than that of the internal massage roller 111, but the striking surface is formed narrow. In other words, the striking surface of the inner massage roller 111 is wide and has a round striking surface, while the striking surface of the external massage roller 112 has a narrow striking surface. This structure can realize steric striking.

For example, the middle portion of the back can be evenly struck and massaged by the internal massage rollers 111, and the back side of the back can be subjected to additional strikes by the external massage rollers 112, And the massage efficiency can be doubled.

In this embodiment, the inner massage rollers 111 and the external massage rollers 112 have the same structure and size. This is for manufacturing convenience. However, unlike the drawings, the internal massage rollers 111 and the external massage rollers 112 may have different structures and sizes from each other.

The massaging massaging module 100 having internal massage rollers 111 and external massaging rollers 112 includes a roller shaft 113, an eccentric connector 114, vibrating bars 115a and 115b, a bar driving part 116 ), And an elastic member (117).

The roller shaft 113 is an axis connecting the inner massage rollers 111 and the external massage rollers 112 in unison. That is, in the case of the present embodiment, the four inner massage rollers 111 and the four outer massage rollers 112 are also operated by a single roller shaft 113 together. Therefore, the configuration is simple and the failure does not occur well.

The eccentric connector 114 is a kind of connector that is connected to the inner massaging rollers 111 and the external massaging rollers 112 to the roller shaft 113, respectively.

At this time, the eccentric connector 114 serves to rotate the inner massage rollers 111 and the external massage rollers 112 eccentrically on the roller shaft 113 when the roller shaft 113 is rotated. That is, when the roller shaft 113 is rotated by a separate driving force, the inner massage rollers 111 and the external massage rollers 112 are rotated eccentrically as indicated by solid lines in FIG. 6 by the eccentric connector 114, Point. Therefore, it is possible to multiply massage efficiency by three-dimensional striking.

A bearing is interposed in the eccentric connector 114 to induce smooth operation of the eccentric connector 114.

The vibrating bars 115a and 115b are respectively connected to the inner massage rollers 111 and the external massage rollers 112 to serve to vibrate the internal massage rollers 111 and the external massage rollers 112 in place .

The bar driving unit 116 is a kind of vibration means for driving the plurality of vibrating bars 115a and 115b. As the vibrating bars 115a and 115b are operated by the bar driving portion 116, the inner massage rollers 111 and the external massage rollers 112 are continuously oscillated in place and rotated to be eccentrically rotated as indicated by the solid line in Fig. 6 And this action can double the massage efficiency due to the steric hitting.

The elastic members 117 serve to elastically support the external massage rollers 112. In this embodiment, the elastic member 117 can be applied as a torsion coil spring.

The module reciprocating unit 160 is provided in the seat frame 141, the backrest frame 143 and the three-dimensional massage massage module 100. The massage massage module 100 is mounted on the seat frame 141 And the backrest frame 143, as shown in Fig.

The module reciprocating unit 160 reciprocates the stereoscopic impact massaging module 100 to the seat frame 141 and the backrest frame 143 by a gear method.

1 and 2, the module reciprocating unit 160 is provided on both sides of the side frames of the seat frame 141 and the backrest frame 143, and includes a seat frame 141 and an entire area of the back frame 143 A pinion gear 162 which is moved while meshing with the rack gear 161 and is connected to the three-dimensional impact massaging module 100 at one side, and a pinion gear 162 which is rotated And a gear motor 164 for driving the motor.

In this embodiment, the rack gear 161 is provided as one single body that is not separated and is coupled to the inner bottom surface of the gear mounting channel 145.

The pinion gear 162 is connected to the module body 101 of the stereoscopic impact massaging module 100 by a gear shaft 163.

The pinion gear 162 is provided at one side thereof with a wheel member 165 which is connected to the pinion gear 162 and rolls in the inside of the gear mounting channel 145.

The wheel member 165 serves to guide the stable movement of the module body 101 while operating with no power. Of course, the wheel member 165 is not necessarily applied, so that the wheel member 165 may not be applied as needed.

The gear motor 164 is directly connected to the pinion gear 162 and is turned on and off by the controller 180 to rotate or stop the pinion gear 162.

Since the gear motor 164 is operated by the controller 180 to rotate the pinion gear 162 so that the pinion gear 162 can be moved while being meshed with the gear 161 along with the rack gear 161, The seat 100 can move up and down the seat frame 141 and the backrest frame 143 according to the forward and reverse directions of the gear motor 164 as shown in FIG.

Meanwhile, the massage chair of the present embodiment further includes an input unit 170 and a controller 180.

The input unit 170 inputs an input signal for operation of the module reciprocating unit 160.

The controller 180 controls the operation of the module reciprocating unit 160 based on the input signal of the input unit 170.

The controller 180 performing such a role may include a central processing unit 181 (CPU), a memory 182 (MEMORY), and a support circuit 183 (SUPPORT CIRCUIT) as shown in FIG.

The central processing unit 181 may be one of various computer processors that can be industrially applied to control the operation of the module reciprocating unit 160 based on the input signal of the input unit 170 in the massage chair of the present embodiment have.

The memory 182 (MEMORY) is connected to the central processing unit 181. The memory 182 may be a computer readable recording medium and may be located locally or remotely and may be any of various types of storage devices, including, for example, random access memory (RAM), ROM, floppy disk, hard disk, At least one or more memories.

The support circuit 183 (SUPPORT CIRCUIT) is coupled with the central processing unit 181 to support the typical operation of the processor. The support circuit 183 may include a cache, a power supply, a clock circuit, an input / output circuit, a subsystem, and the like.

The operation of the module reciprocating unit 160 is controlled based on the input signal of the input unit 170 in the massage chair according to the present embodiment. At this time, a series of processes or the like in which the controller 180 controls the operation of the module reciprocating unit 160 based on the input signal of the input unit 170 may be stored in the memory 182. [

Typically, a software routine may be stored in the memory 182. The software routines may also be stored or executed by other central processing units (not shown).

Although processes according to the present invention are described as being performed by software routines, it is also possible that at least some of the processes of the present invention may be performed by hardware.

As such, the processes of the present invention may be implemented in software executed on a computer system, or in hardware such as an integrated circuit, or in combination of software and hardware.

We will briefly discuss the action of a massage chair with this configuration.

First, the input unit 170 is operated by sitting on a massage chair. Then, the gear motor 164 of the module reciprocating unit 160, which is controlled by the controller 180, is operated.

That is, when the gear motor 164 is operated by the controller 180 to rotate the pinion gear 162, the pinion gear 162 can be moved while being engaged with the rack gear 161, 100 can move up and down the seat frame 141 and the backrest frame 143 according to the normal and reverse directions of the gear motor 164 as shown in FIG.

Accordingly, the inner massage roller 111 provided in the three-dimensional massage massage module 100 can sequentially massage the user's back, buttocks, and lower thighs, thereby doubling the efficiency of the whole body massage.

According to this embodiment having such a structure and action, it is possible to massage both the buttocks and the lower thighs through the efficient structure of the integrated type, and in particular, by performing the three-dimensional striking by departing from the simple- So that the efficiency of the whole body massage can be improved.

FIG. 8 is a schematic front view of a stereoscopic impact massaging module in a massage massage applicator according to a second embodiment of the present invention. FIG.

The massage massage implement 200 according to the present embodiment may also include a roller shaft 213 and an eccentric connector 114 in addition to the inner massage rollers 111 and the external massage rollers 112. [ Vibrating bars 115a and 115b, a bar driving unit 116, and an elastic member 117 to perform a stereoscopic impact massage.

At this time, the roller shaft 213 is provided in a structure such as a telescopic bar shape in which the length can be increased or decreased along the longitudinal direction, unlike the above-described embodiment.

In this case, since the distance between the inner massage rollers 111 and the outer massage rollers 112 can be adjusted through the adjustment of the length of the roller shaft 213, it can be effectively applied to different body sizes.

Even if the structure of the present embodiment is applied, it is possible to massage both the buttocks and the lower thighs through the efficient structure of the integral type. In particular, by performing the striking stroke out of the simple striking massage method, Can be improved.

FIG. 9 is a schematic front view of a stereoscopic impact massaging module in a massage massage device for a massage according to a third embodiment of the present invention. FIG.

The massage massage implement 300 according to the present embodiment may also include a roller shaft 113 and an eccentric connector 114 in addition to the internal massage rollers 111 and the external massage rollers 312. [ Vibrating bars 115a and 115b, a bar driving unit 116, and an elastic member 117 to perform a stereoscopic impact massage.

At this time, each of the external massage rollers 312 is applied in a double structure so as to be arranged in pairs on both sides. If the additional external massage rollers 312 are provided in a pair of double structures, it may be more helpful to perform the stereoscopic impact massage.

Even if the structure of the present embodiment is applied, it is possible to massage both the buttocks and the lower thighs through the efficient structure of the integral type. In particular, by performing the striking stroke out of the simple striking massage method, Can be improved.

FIG. 10 is a schematic front view of a stereoscopic impact massaging module in a massage massage applicator according to a fourth embodiment of the present invention. FIG.

Referring to this figure, the massage massage implement 400 according to the present embodiment also includes the roller shaft 113, the eccentric connector 114, and the external massage roller 412 in addition to the internal massage rollers 111 and the external massage rollers 412. [ Vibrating bars 115a and 115b, a bar driving unit 116, and an elastic member 117 to perform a stereoscopic impact massage.

In this embodiment, the outer massage rollers 412 are arranged in pairs so that the pair of outer massage rollers 412 are arranged on both sides of the outer massage rollers 412. The outer massage rollers 412 are different in size from each other, . Applying such a structure may be more helpful in performing stereoscopic impact massaging.

Even if the structure of the present embodiment is applied, it is possible to massage both the buttocks and the lower thighs through the efficient structure of the integral type. In particular, by performing the striking stroke out of the simple striking massage method, Can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

1: Massage chair 10: Massage chair massage equipment
100: Three-dimensional striking massage module 101: Module body
111: Internal massage roller 112: External massage roller
113: roller shaft 114: eccentric connector
115a, 115b: vibrating bar 116: bar driving part
117: elastic member 141: seat frame
143: backrest frame 145: channel for gear installation
146: multiple reinforcing frames 160: module reciprocating part
161: Rack gear 162: Pinion gear
163: Gear shaft 164: Gear motor
165: wheel member 170: input part
180: controller

Claims (12)

A seat frame disposed within the seat of the massage chair;
A backrest frame connected to the seat frame and disposed in a backrest of the massage chair; And
A plurality of inner massage rollers, and a plurality of external massage rollers disposed externally of the internal massage rollers and independently operating with the internal massage rollers to conduct massaging in a three-dimensional manner, the user's back, And includes a three-dimensional impact massage module that sequentially massage and reciprocate,
The diameter of the external massage roller is larger than that of the internal massage roller, but the striking surface is formed narrower,
Wherein the stereoscopic impact massaging module further comprises an elastic member formed of a torsion coil spring for elastically supporting the external massage rollers.
The method according to claim 1,
Wherein the plurality of inner massage rollers and the plurality of external massage rollers are arranged in pairs, respectively.
delete The method according to claim 1,
Wherein the stereoscopic impact massaging module comprises:
A roller shaft integrally connecting the inner massage rollers and the external massage rollers; And
Each of the inner and outer massaging rollers and the external massaging rollers being connected to the roller shaft such that when the roller shaft is rotated, the internal massing rollers and the external massaging rollers are eccentrically rotated on the roller shaft, Wherein the massage device comprises a connector.
5. The method of claim 4,
And a bearing is interposed in the eccentric connector.
5. The method of claim 4,
Wherein the stereoscopic impact massaging module comprises:
A plurality of vibrating bars for vibrating the inner and outer massaging rollers, respectively, in place; And
And a bar driving unit for driving the plurality of vibrating bars.
delete The method according to claim 1,
And a module reciprocating unit provided in the left frame, the backrest frame, and the module for massaging the massage module, the module reciprocating unit reciprocating the stereoscopic impact massaging module to the left and right backrest frames by a gear system. Massage equipment such as a chair massage.
9. The method of claim 8,
The module reciprocating unit includes:
A rack gear provided on both sides of the side frames of the left and right frame and across the entire area of the left and right frame;
A pinion gear which is moved while being meshed with the rack gear and connected to the three-dimensional impact massage module at one side; And
And a gear motor for rotating the pinion gear.
10. The method of claim 9,
Shaped groove for installing a gear is installed on both sides of a side region of the seat frame and the backrest frame,
Wherein the module reciprocating portion further comprises a wheel member connected to the pinion gear and rolling in an inner side of the gear mounting channel.
9. The method of claim 8,
An input unit for inputting an input signal for operation of the module reciprocating unit; And
And a controller for controlling the operation of the module reciprocating unit based on an input signal of the input unit.
The method according to claim 1,
Further comprising a plurality of reinforcement frames coupled to the seat frame and the backrest frame by positions to reinforce the seat frame and the backrest frame,
Wherein an upper end of the backrest frame protrudes forward by a predetermined distance from the remaining area.

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