KR102221974B1 - Exercise assisting apparatus for squat - Google Patents

Abstract

The present invention relates to a squat exercise assisting device that enables a squat exercise to be performed in a correct posture by hanging a barbell on the back of a user, and to assist the squat exercise by pushing the user's buttocks upward, and comprising: a base; A squat exercise assisting unit coupled to the center of the base unit to support a user's buttocks during a squat exercise or to push the user's buttocks upwards; Two barbell support portions coupled to both sides of the base portion; And a barbell part connected by connecting an upper end of the barbell support part.

Description

Squat exercise assisting apparatus {Exercise assisting apparatus for squat}

The present invention relates to a squat exercise assisting device, in particular, to perform the squat exercise in a correct posture by hanging a barbell on the back of the user, and to assist the squat exercise by pushing the user's buttocks upward It is about the apparatus.

Squat exercise is a basic exercise for lower body exercise by sitting and standing until the thighs and knees are at a right angle.This squat exercise is excellent for correcting the legs and strengthening muscles, but it is a high-intensity exercise that is highly likely to cause body injuries. You must work out in the correct posture and prepared for injury.

When performing the squat movement, it is difficult to take a posture because the center of the body goes backwards, so there are many cases where the squat movement cannot be performed for a long time and easily give up. Beginners as well as advanced people have difficulty exercising.

Korean Patent Registration No. 10-1720874 (registered on Mar. 22, 2017) describes an exercise aid for squat exercise, and according to the disclosed technology, a support frame; A front support portion provided above the support frame to support a foot; A rear support portion provided above the support frame and provided at a predetermined distance from the front support portion; It is coupled to the rear support and can adjust the length in the vertical direction, and includes a calf support to which the calf is supported, the foot is supported on the anterior support, and the calf is supported on the calf support, so that the knee and the foot are held in a fixed state. It is characterized in that the movement to take place is possible.

Korean Patent Registration No. 10-1921218 (registered on November 16, 2018) describes a squat exercise device. According to the disclosed technology, a support plate having a lower portion fixed to the ground is provided, and a support part provided with a main plate capable of being rotated or fixed on the support plate by being connected to the upper part of the support plate; A foot guide unit provided on the main plate to guide the position of the user's foot and fix the foot at the same time; A calf guide portion disposed adjacent to the foot guide portion on the main plate to support a calf portion of the user; And a hip support part disposed adjacent to the calf guide part on the main plate to support the user's buttocks and assisting the elevation of the buttocks, wherein the foot guide part guides the support position of the sole while the user's sole is received. Including a stencil groove, a foot fixing plate that pressurizes the instep of the foot entering the stencil from the top to maintain a fixed position of the foot, and a foot elevating and descending device for controlling the vertical position of the foot fixing plate according to the size of the user's foot. It is characterized by that.

As described above, conventional squat assistive exercise devices can simply support the buttocks when the user bends down the knee during squat exercise, but cannot have an exercise effect beyond their own weight, and separately add weights such as barbells. Even if you do squat, your posture may be distorted or the weight of a barbell may strain your body, and for beginners, it may be difficult to perform the squat movement, such as sitting and standing, and there is a risk of large and small injuries. For this reason, it is still difficult to perform an efficient squat exercise.

Korean Patent Registration No. 10-1720874 Korean Patent Registration No. 10-1921218

The technical problem to be achieved by the present invention is to solve the above-described problems, so that a barbell can be held on the user's back to perform a squat exercise in a correct posture, and the user's buttocks are pushed upward to perform the squat exercise. Provide a squat exercise aid to assist.

In order to solve this problem, according to one feature of the present invention, the base portion; A squat exercise assisting unit coupled to the center of the base unit to support a user's buttocks during a squat exercise or to push the user's buttocks upwards; Two barbell support portions coupled to both sides of the base portion; And it provides a squat exercise assisting device comprising a barbell portion coupled by connecting the upper end of the barbell support.

In one embodiment, the squat exercise auxiliary unit, a coupling plate coupled to the center of the base portion; Two supports vertically formed at a predetermined interval on the upper portion of the coupling plate; Two support plates each formed on the upper end of the support to support the user's buttocks; A lifting plate having one side rotatably connected between one side of the base plate to push the user's buttocks upward; And a lift plate driving unit for generating a driving force that pushes up the other side of the lift plate.

In one embodiment, the squat exercise assistant is formed between the base portion and the coupling plate, characterized in that it further comprises a height adjustment member for adjusting the height of the coupling plate.

In one embodiment, the barbell support portion, a support rod formed on the base portion; An auxiliary support rod formed on the upper portion of the support rod and moving in a vertical direction; A guide pipe fixed to an upper end of the support rod and configured to guide the auxiliary support rod in the vertical direction; A spring formed between the support rod and the auxiliary support rod to provide an elastic force to the auxiliary support rod; And a ring formed on the upper end of the auxiliary support bar and fixing the barbell part.

In one embodiment, the barbell support portion is coupled between the support rod and the base portion, characterized in that it further comprises a shake preventing member for preventing the vibration of the support rod.

According to the present invention, by placing a barbell on the user's back to perform a squat exercise under a load, a full-body exercise capable of developing both upper and lower bodies is possible, and the user's By pushing the buttocks upwards, the squat movement is assisted to prevent excessive pressure on specific parts of the user's body such as the waist or knees, and more squat movements can be repeated, so that stable and efficient exercise can be performed.

According to the present invention, even if strong pressure is applied to the user by the weight of the barbell, the upper body only serves as a support and the pressure applied to the lower body, which is an exercise axis, is reduced to less than half. The applied pressure has the effect of stabilizing the spine and relieving fatigue.

1 is a perspective view illustrating a squat exercise aid according to a first embodiment of the present invention.
FIG. 2 is a perspective view illustrating a squat exercise assistant in FIG. 1.
3 to 4 are cross-sectional views for explaining the driving of the squat exercise assistant in FIG. 2.
5 is a cross-sectional view illustrating a squat exercise assistant in FIG. 1 as another example.
6 is a cross-sectional view illustrating the barbell support in FIG. 1.
7 is a perspective view illustrating another example of the barbell support shown in FIG. 1.
8 is a cross-sectional view illustrating a squat exercise aid according to a second embodiment of the present invention.
9 is a front view illustrating a squat exercise aid according to a third embodiment of the present invention.
FIG. 10 is a block diagram illustrating a squat exercise assistant in FIG. 1 as another example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

Meanwhile, the meanings of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that no other component exists in the middle. On the other hand, other expressions describing the relationship between components, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to the specified features, numbers, steps, actions, components, parts, or these. It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Now, a squat exercise aid according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view for explaining a squat exercise aid according to a first embodiment of the present invention.

Referring to FIG. 1, the squat exercise assisting device 10 includes a base part 100, a squat exercise assisting part 200, a barbell support part 300, and a barbell part 400.

The base part 100 is installed flat on the floor of a place for exercise, and a squat exercise assistant 200, a barbell support 300, and a barbell 400 are mounted.

In one embodiment, the base portion 100, the lower surface is fixed to the floor, when the user exercises the components (squat exercise aid 200, barbell support 300, barbell 400) is in a stable state. To be able to maintain it.

The squat exercise assistance part 200 is coupled to the center of the base part 100 to support the buttocks when the user bends the knee and goes down during the squat exercise, or pushes the user's buttocks upward when the knee is stretched again. It is given to aid in the ascending force.

The barbell support part 300 is composed of two, is coupled to both sides of the base part 100, respectively, and supports and supports the barbell part 400.

In one embodiment, the barbell support 300 may be spaced apart from each other by about 70 to 80 cm, and may have a height of about 100 to 120 cm.

The barbell part 400 is coupled by connecting the upper ends of the two barbell support parts 300, so that a load can be applied to the user during the squat exercise.

In one embodiment, the barbell unit 400 may be composed of a barbell bar and a barbell, and the barbell bar is fixedly coupled to each upper end of the barbell support unit 300, and one or a plurality of barbells on both sides of the barbell bar is selectively As it is combined, it can be used by adjusting the weight according to the user.

In one embodiment, the barbell part 400 is coupled to the upper end of each barbell support part 300 and is in close contact with the user's back in a straight line without being biased to either side, so that a certain pressure can be applied to the user, and during exercise There is no slip or fall, which can reduce the risk of injury.

The squat exercise assisting device 10 having the configuration as described above is a whole body capable of developing both upper and lower bodies by placing the barbell part 400 on the user's back to perform the squat exercise under load. Exercise is possible, and while maintaining the correct squat posture, the squat exercise assistant 200 assists the squat exercise by pushing the user's buttocks upwards to prevent excessive pressure on specific parts of the user's body such as the waist or knees. Since you can repeat more squat movements, you can perform stable and efficient exercise.

In addition, the biggest cause of fatigue is gravity, and the method for recovering fatigue is to apply strong pressure in the correct posture. According to the above-described squat exercise aids 10, the user by the weight of the barbell 400 Even if a strong pressure is applied to the upper body, the upper body only serves as a support, and the pressure applied to the lower body, which is an exercise axis through the squat exercise assistant 200, is reduced to less than half, so that the recovery speed of the muscles after exercise is fast, and the upper body is applied. Pressure can stabilize the spine and relieve fatigue.

FIG. 2 is a perspective view illustrating a squat exercise assistant in FIG. 1, and FIGS. 3 to 4 are cross-sectional views illustrating driving of the squat exercise assistant in FIG. 2.

Referring to these drawings, the squat exercise assistant 200 includes a coupling plate 210, a support 220, a support plate 230, a lift plate 240, and a lift plate driving unit 250.

The coupling plate 210 is coupled to the center of the base portion 100 so that the support 220, the support plate 230, the lift plate 240, and the lift plate driving unit 250 are mounted.

In one embodiment, the coupling plate 210 is formed with a non-slip member (not shown) on the upper surface, it is possible to prevent the user's feet from slipping during exercise.

The support 220 is composed of two, is vertically formed at a predetermined interval (eg, 30 ~ 50cm) on the upper portion of the coupling plate 210, and supports the support plate 230.

The base plate 230 is formed on the upper end of the two support bases 220, respectively, and supports the buttocks when the user bends the knee and goes down during the squat exercise.

In one embodiment, the base plate 230 is provided with a cushion made of an elastic material (eg, styrofoam, etc.) for alleviating the impact therein, so that the user does not cause pain even when exercising for a long time.

In one embodiment, the base plate 230 is formed narrower than the rear part, so that it is easy for the user to take a sitting position during the squat exercise.

The elevator plate 240 is formed to be connected to be able to rotate up and down between one side of the two support plates 230, and the user straightens the knee during the squat exercise while rotating up and down according to the driving of the elevator plate driving unit 250. As you go up, push your buttocks upwards. On the contrary, when the user bends the knee again, it helps to slowly descend to the correct squat posture while maintaining tension without rushing down.

In one embodiment, the elevator plate 240 is provided with a cushion made of an elastic material (eg, styrofoam, etc.) for relieving an impact therein so as not to cause pain even if the user exercises for a long time.

The elevator plate driving unit 250 is formed between the coupling plate 210 and the elevator plate 240 to generate a driving force that pushes up the other side of the elevator plate 240.

In one embodiment, the elevator plate driving unit 250 may push up the other side of the elevator plate 240 to a height of about 20 to 40 cm.

In one embodiment, the lifting fan driving unit 250 may include a motor 251, a power supply means (not shown), a crank 252, a connecting rod 253, and a piston 254.

The motor 251 is mounted on the coupling plate 210 and receives power from a power supply means to generate a rotational force.

In one embodiment, the motor 251 is described as having a single axis structure in the drawing, but may be formed in a double axis structure as needed.

The power supply means is connected to the motor 251 and supplies the necessary power to the motor 251.

In an embodiment, the power supply means may receive commercial power from an external source, convert the received commercial power into power required for the motor, and supply the power.

In one embodiment, the power supply means is formed of a rechargeable battery, and when power is not supplied to the motor 251, it is connected to a charging device to charge, and the charged power may be supplied to the motor 251.

The crank 252 is coupled to the rotation shaft of the motor 251 and rotates according to the rotational force of the motor 251.

The connecting rod 253 has one end rotatably coupled to the crank 252, the piston 254 is connected to the other end, and converts the rotation of the crank 252 into linear motion and transmits it to the piston 254. .

Piston 254, one end is rotatably coupled with the other end of the connecting rod 253, the other end is rotatably coupled with the lower surface of the other side of the lifting plate 240, and the movement of the connecting rod 253 Accordingly, while reciprocating in the vertical direction, as shown in FIG. 3 or 4, the other side of the elevator plate 240 is pushed up or returned to its original position.

In one embodiment, the elevator plate driving unit 250 may further include a speed control means (not shown).

The speed control means adjusts the rotational speed of the motor 251 by adjusting the amount of power supplied from the power supply means.

In one embodiment, the speed control means is formed by dividing the rotation stage, and connecting a variable resistor to each of the divided rotation stages, and by varying the resistance value according to the rotation stage, the size of the power transmitted from the power supply means is changed. By adjusting and supplying it to the motor 251, the rotational speed of the motor 251 can be adjusted according to the user's manipulation.

5 is a cross-sectional view illustrating a squat exercise assistant in FIG. 1 as another example.

Referring to FIG. 5, the squat exercise assistant 200 includes a coupling plate 210, a support 220, a support plate 230, a lifting plate 240, a lifting plate driving part 250, and a height adjusting member 260. Includes. Here, the coupling plate 210, the support 220, the support plate 230, the lifting plate 240, and the lifting plate driving part 250 are similar to the components of FIG. 2, so the description thereof is omitted and only other parts are described below. Explain.

The height adjustment member 260 is formed between the base portion 100 and the coupling plate 210 so that the height of the coupling plate 210 can be adjusted and used according to the physical condition of the user or needs.

In one embodiment, the height adjustment member 260 may be formed of a cylinder and a power device (not shown).

The cylinder is installed in a vertical direction between the base portion 100 and the coupling plate 210, and adjusts the height of the coupling plate 210 while receiving power from the power device and reciprocating in the vertical direction.

In one embodiment, the cylinder is described as being formed as one in the center between the base portion 100 and the coupling plate 210, but may be formed in a larger number as necessary.

In one embodiment, the cylinder may be formed in any one of an electric method, a hydraulic method, and a pneumatic method.

The power device is connected to the cylinder and transmits the power required for the movement of the cylinder.

The height adjustment member 260 having the configuration as described above functions to adjust the height of the cylinder using an up/down switch (not shown), and can adjust the height of the cylinder in real time.

6 is a cross-sectional view illustrating the barbell support in FIG. 1.

Referring to FIG. 6, the barbell support 300 includes a support bar 310, an auxiliary support bar 320, a guide tube 330, a spring 340, and a ring 350.

The support bar 310 is formed perpendicular to the base part 100 and supports the barbell part 400.

In one embodiment, the support rod 310 may be fixed to a groove formed in the base portion 100 by screwing with a screw thread provided at the lower end.

The auxiliary support bar 320 is formed on the upper portion of the support bar 310 and is installed to be movable in the vertical direction, so that the barbell part 400 can be lifted or lowered by a user's squat operation.

The guide tube 330 is fixedly formed on the upper end of the support bar 310, and guides it in the vertical direction by inserting the auxiliary support bar 320. At this time, the auxiliary support bar 320 is allowed to move only in the vertical direction so as not to be displaced.

The spring 340 is formed between the support bar 310 and the auxiliary support bar 320 to provide an elastic force to the auxiliary support bar 320. Accordingly, the auxiliary support bar 320 can return to its original position, and the intensity of exercise can be adjusted by adjusting the tension.

The ring 350 is formed on the upper end of the auxiliary support bar 320, and is fixed by inserting the barbell part 400.

7 is a perspective view illustrating another example of the barbell support shown in FIG. 1.

Referring to FIG. 7, the barbell support 300 includes a support bar 310, an auxiliary support bar 320, a guide tube 330, a spring 340, a ring 350, and an anti-shake member 360. Here, since the support bar 310, the auxiliary support bar 320, the guide tube 330, the spring 340, and the ring 350 are similar to the components of FIG. 6, the description thereof will be omitted and only other parts will be described below. .

The shaking preventing member 360 is coupled between the support bar 310 and the base portion 100 to prevent shaking of the support bar 310.

That is, even when pressure is applied, the support bar 310 is not shaken by the shake preventing member 360, so that the user can stably continue the squat exercise.

In one embodiment, the shaking prevention member 360 may be formed of an prevention plate 361, an prevention bar 363, and a fastening means 364.

The prevention plate 361 is provided with a through hole 362 in the center, and is fixed by passing the support bar 310 through the through hole 362.

The prevention bar 363 has an upper end coupled to both sides of a lower portion of the prevention plate 361, and a lower end thereof coupled to the base portion 100 to support the prevention plate 361.

In one embodiment, the prevention bar 363 is formed to have a height of about 50 to 70 cm, and supports the prevention plate 361 so that it can be located at about an intermediate height of the support bar 310.

The fastening means 364 is fastened between the lower end of the prevention bar 363 and the base portion 100.

In one embodiment, the fastening means 364, as a bolt, penetrates the lower end of the prevention bar 363 and is inserted into the base part 100, so that it is easily between the lower end of the prevention bar 363 and the base part 100 Can be concluded.

8 is a cross-sectional view illustrating a squat exercise aid according to a second embodiment of the present invention.

Referring to FIG. 8, the squat exercise assisting device 10 includes a base part 100, a squat exercise assisting part 200, a barbell support part 300, a barbell part 400, and a lumbar support part 500. Here, the base unit 100, the squat exercise auxiliary unit 200, the barbell support unit 300, and the barbell unit 400 are similar to the components of FIG. 1, so the description thereof will be omitted and only other parts will be described below.

The lumbar support part 500 is formed to extend upward on one side (preferably the rear side) of the elevator plate 220 of the squat exercise auxiliary part 200 to support the user's waist.

In an embodiment, the lumbar support part 500 protects the user's waist by supporting the user's waist in close contact, and prevents an incorrect posture in which the waist is excessively bent or curled during a squat operation.

9 is a front view illustrating a squat exercise aid according to a third embodiment of the present invention.

Referring to FIG. 9, the squat exercise assisting device 10 includes a base part 100, a squat exercise assisting part 200, a barbell support part 300, a barbell part 400, and a hinge part 600. Here, the base unit 100, the squat exercise auxiliary unit 200, the barbell support unit 300, and the barbell unit 400 are similar to the components of FIG. 1, so the description thereof will be omitted and only other parts will be described below.

The hinge portion 600 is formed to be coupled between the base portion 100 and the coupling plate 210, and rotates the coupling plate 210 in the left and right directions.

In the case of a person with a twisted pelvis, the load is concentrated on one of the two support plates 230 during the squat operation, and the hinge portion 600 is the base portion 100 and the coupling plate so that the coupling plate 210 can be rotated in the left and right directions. By combining the portions 210, the coupling plate 210 rotates in the direction in which the load is concentrated, thereby eliminating the phenomenon that the load is concentrated on either side of the user, thereby preventing the induction of pain in the pelvis.

The squat exercise assisting device 10 having the configuration as described above may further include a plurality of auxiliary springs between the base portion 100 and the coupling plate 210 on which the hinge portion 600 is not formed.

Such an auxiliary spring prevents the phenomenon that the coupling plate 210 is horizontally formed in a normal time, and the coupling plate 210 is suddenly rotated to either side by the hinge part 600 when a user's load is applied. When the load is removed, an elastic force is provided so that the coupling plate 210 returns to the horizontal state again.

Since the squat operation must be performed while the foot is fixed, the user performs the exercise while placing the foot on the base portion 100 fixed flat on the floor.

FIG. 10 is a block diagram illustrating a squat exercise assistant in FIG. 1 as another example.

Referring to FIG. 10, the squat exercise assistant 200 includes a coupling plate 210, a support 220, a support plate 230, a lifting plate 240, a lifting plate driving part 250, a pressure sensor 270, and a control And means 280. Here, the coupling plate 210, the support 220, the support plate 230, the lifting plate 240, and the lifting plate driving part 250 are similar to the components of FIG. 2, so the description thereof is omitted and only other parts are described below. Explain.

The proximity sensor 270 is formed on the coupling plate 210 and detects a user's approach to generate a proximity signal.

In one embodiment, the proximity sensor 270 may be formed of an infrared sensor, and a voltage is applied when a person is close, and the voltage is turned off when a person is separated by a predetermined distance or more.

The control means 280 receives a proximity signal from the proximity sensor 270 to generate a driving signal for driving the motor 251 of the elevator plate driving unit 250, and transmits the generated driving signal to the motor 251 do.

Accordingly, even if a separate switch is not operated, the elevator plate driving unit 250 is automatically driven when the user is detected using the proximity sensor, thereby maximizing the user's convenience.

As described above, the embodiments of the present invention are not implemented only through the above-described apparatus and/or operation method, but through a program for realizing a function corresponding to the configuration of the embodiment of the present invention, a recording medium in which the program is recorded, etc. It may be implemented, and this implementation can be easily implemented by an expert in the technical field to which the present invention belongs from the description of the above-described embodiment.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

10: squat exercise aid
100: base part
200: squat exercise aid
210: bonding plate
220: support
230: base plate
240: elevator plate
250: elevator plate driving unit
251: motor
252: crank
253: connecting rod
254: piston
260: height adjustment member
270: proximity sensor
280: control means
300: barbell support
310: support rod
320: auxiliary support rod
330: guide tube
340: spring
350: ring
360: anti-shake member
361: prevention plate
362: through hole
363: prevention bar
364: fastening means
400: barbell part
500: lumbar support
600: left and right pivot

Claims (5)

Base portion;
A squat exercise assistance part coupled to the center of the base part to support a user's buttocks during a squat exercise or to push a user's buttocks upwards;
Two barbell support portions coupled to both sides of the base portion; And
Including a barbell portion coupled by connecting the upper end of the barbell support,
The squat exercise assistant,
A coupling plate coupled to the center of the base portion;
Two supports vertically formed at a predetermined interval on the upper portion of the coupling plate;
Two support plates each formed on the upper end of the support to support the user's buttocks;
A lifting plate having one side rotatably connected between one side of the base plate, and for pushing the user's buttocks upward; And
A squat exercise assisting apparatus comprising a lifting plate driving part for generating a driving force that pushes up the other side of the lifting plate.
delete The method of claim 1, wherein the squat exercise assistant,
It is formed between the base portion and the coupling plate, the squat exercise assisting device, characterized in that it further comprises a height adjustment member for adjusting the height of the coupling plate.
The method of claim 1, wherein the barbell support,
A support rod formed on the base portion;
An auxiliary support rod formed on the upper portion of the support rod and moving in a vertical direction;
A guide pipe fixed to an upper end of the support rod and configured to guide the auxiliary support rod in the vertical direction;
A spring formed between the support rod and the auxiliary support rod to provide an elastic force to the auxiliary support rod; And
It is formed on the upper end of the auxiliary support rod, squat exercise assisting device, characterized in that it comprises a ring for fixing the barbell.
The method of claim 4, wherein the barbell support,
A squat exercise assisting device, characterized in that it further comprises a shake preventing member coupled between the support rod and the base portion to prevent shaking of the support rod.

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