CN111067778A

CN111067778A - Massage device for rolling back

Info

Publication number: CN111067778A
Application number: CN202010042850.3A
Authority: CN
Inventors: 王玲; 吴慧欣; 王雨馨; 马鹤洋; 朱翰林
Original assignee: University of Science and Technology Liaoning USTL
Current assignee: University of Science and Technology Liaoning USTL
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-04-28

Abstract

The invention relates to a back rolling massage device, which comprises a supporting frame, a self-adjusting bracket, a translation mechanism and a plurality of massage modules, wherein the supporting frame is provided with a plurality of supporting rods; the supporting frame consists of 2 door-shaped frames, and the translation mechanism consists of a stepping motor, a lead screw and a lead screw nut; the lead screw is arranged between the cross beams of the 2 door-shaped frames, and one end of the lead screw is connected with the stepping motor; the massage modules are connected into a whole through a self-adjusting bracket, and the top of the self-adjusting bracket is in transmission connection with a lead screw through a lead screw nut; under the driving of the stepping motor, the self-adjusting bracket drives the plurality of massage modules to longitudinally reciprocate along the screw rod; the bottom of the self-adjusting support is provided with a plurality of plum blossom-shaped rollers, and the self-adjusting support consists of a sliding connecting frame, a fishbone-shaped support and a swinging frame which are sequentially connected from top to bottom; the height and the angle of the plum blossom idler wheel can be automatically adjusted under the action of external force through the self-adjusting support. The back-relaxing massage device is simple and exquisite in structure and practical in function, meets the requirement of back relaxing massage of people at home, and is an ideal body-building and health-preserving device.

Description

Massage device for rolling back

Technical Field

The invention relates to the technical field of health care equipment, in particular to a back rolling massage device.

Background

Since ancient times, people know that the back can be massaged and massaged to achieve the purposes of body building and disease prevention, and modern science proves that the back massage can relieve fatigue, relieve muscle tension and promote blood circulation.

In daily life, many old people can often see that the back massage purpose is achieved by impacting a trunk or a fitness device with a vertical back massage function in a park, but the action of impacting the trunk influences the growth of trees, and the method is not worthy of advocation. The height of the massage part of the fitness equipment is fixed, so that people with short stature can not reach the fitness equipment, and people with high stature can only bend knees, so that the fitness equipment cannot be suitable for people with different statures. Moreover, the fitness equipment can only be used outdoors, and because the vertical structure is adopted, a user needs to apply larger external force, the use is inconvenient, and the ideal effect is difficult to achieve.

For young people, especially for people who often sit in front of a computer to work, cervical vertebra and back muscles are often in a tense state due to high working strength, and become rigid and hard; to relieve fatigue during the day, an attempt may be made to massage the back. Back massage is also a good way of health maintenance, which needs to be performed consistently for a long time, and it is not very practical to go to a massage hospital every day to perform professional back care.

Aiming at the problems, the back rolling massage device which is suitable for being used at home, is convenient to operate and has a promoting effect on body health is designed, and certain market demands are met.

Disclosure of Invention

The invention provides a back rolling massage device which is simple and exquisite in structure and practical in function, meets the requirement of back relaxing massage of people at home, and is an ideal body-building and health-preserving apparatus.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rolling back massage device comprises a supporting frame, a self-adjusting bracket, a translation mechanism and a plurality of massage modules; the support frame consists of 2 door-shaped frames arranged side by side, and the translation mechanism consists of a stepping motor, a lead screw and a lead screw nut; the lead screw is arranged between the cross beams of the 2 door-shaped frames, the lead screw is rotatably connected with the door-shaped frames, and one end of the lead screw is connected with the stepping motor; the massage modules are connected into a whole through a self-adjusting bracket, and the top of the self-adjusting bracket is in transmission connection with a lead screw through a lead screw nut; under the driving of the stepping motor, the self-adjusting bracket drives the plurality of massage modules to synchronously reciprocate along the longitudinal direction of the screw rod; the bottom of the self-adjusting support is provided with a plurality of plum blossom-shaped rollers, and the self-adjusting support consists of a sliding connecting frame, a fishbone-shaped support and a swinging frame which are sequentially connected from top to bottom; the height and the angle of the plum blossom idler wheel can be automatically adjusted under the action of external force through the self-adjusting support.

The door-shaped frame consists of 2 upright posts and 1 cross beam, and the bottoms of the 2 upright posts are respectively provided with a supporting disk; the top of the upright post is welded and fixed with the corresponding end of the cross beam.

The middle part of the cross beam is provided with a bearing seat, two ends of the lead screw are respectively supported in the shaft holes of the bearing seats at the corresponding ends through bearings, a bearing end cover is arranged outside the bearing seat corresponding to one end of the lead screw to seal the shaft holes, and the other end of the lead screw passes through the shaft hole of the other bearing seat and is connected with an output shaft of the stepping motor through a coupler; the outer side of the stepping motor is provided with a sleeve-shaped motor base, and the inner end of the motor base is fixedly connected with the end part of the lead screw.

And a stepping motor controller is arranged on the stepping motor.

A nut fixing seat is arranged on the outer side of the screw nut, and a flange structure is arranged at one end of the screw nut and is connected with the nut fixing seat through an end bolt; the bottom of the nut fixing seat is provided with a bottom foot which is fixedly connected with the self-adjusting support through a connecting bolt.

The sliding connection frame consists of a top plate, a screw rod and a telescopic guide sleeve, the top of the top plate is fixedly connected with the nut fixing seat, the center of the bottom of the top plate is provided with the screw rod, and the two sides of the screw rod are respectively provided with the telescopic guide sleeve; the telescopic guide sleeve is a sliding connection structure consisting of a sliding sleeve and a sliding rod, the top end of the sliding sleeve is fixedly connected with the top plate, the bottom end of the sliding rod is fixedly connected with the central rod of the fishbone-shaped support, and the top of the sliding rod extends into the sliding sleeve; the lower end of the screw rod penetrates through a central rod of the fishbone-shaped support, adjusting nuts are respectively arranged on the screw rods on two sides of the central rod, and a blocking piece is arranged at the bottom end of the screw rod.

The fishbone-shaped support comprises well core rod and a plurality of arc pole, and the arc pole sets up at well core rod bilateral symmetry, and vertically sets up a plurality ofly along well core rod.

The swing frame consists of an inverted U-shaped frame and a roller frame; the middle part of the inverted U-shaped frame is fixedly connected with the bottom end of the arc-shaped rod, two ends of the inverted U-shaped frame are respectively connected with 1 roller frame, each roller frame consists of 1T-shaped frame, 2L-shaped swing arms and 2 lower swing shafts, each T-shaped frame consists of an upper swing shaft and a connecting rod, each connecting rod is connected with one end of the inverted U-shaped frame in a sliding mode through a sleeve structure, and a spring is arranged in each sleeve structure; the lower rotating shaft is parallel to the upper swinging shaft and is arranged at two sides below the upper swinging shaft; the middle part of the L-shaped swing arm is connected with the corresponding end of the upper swing shaft through a hinge bolt, and the two ends of the L-shaped swing arm are respectively hinged with the corresponding ends of the lower rotating shaft.

Two ends of the upper swing shaft extend into shaft holes formed in the corresponding ends of the L-shaped swing arms, the upper swing shaft and the L-shaped swing arms are connected through keys, key grooves are formed in the tops of the shaft holes in the L-shaped swing arms, the central angles corresponding to the key grooves are 90 degrees, namely the L-shaped swing arms can only swing within the range of 45 degrees on two sides of the vertical axis; the outer side of the L-shaped swing arm is provided with a hinged bolt connected with the end face of the upper swing shaft, and the joint is provided with a tubular anti-loosening rubber mat.

The plum blossom idler wheel is a cylindrical body with a plum blossom-shaped cross section, is coaxially sleeved on the outer side of the lower rotating shaft and can rotate around the axis of the lower rotating shaft along with the lower rotating shaft; the material of plum blossom gyro wheel is silica gel.

Compared with the prior art, the invention has the beneficial effects that:

1) the back relaxing massage device has simple and exquisite structure and practical functions, meets the requirement of back relaxing massage of people at home, and is an ideal body-building and health-preserving device;

2) the stepping motor provides power, and as long as the stepping motor is connected with a power supply, the stepping motor drives the screw rod to rotate and simultaneously drives the plurality of massage modules to reciprocate back and forth, so that the whole back is massaged in an all-round way;

3) the massage module adopts a combination form of a self-adjusting bracket and a plum blossom roller, and the height and the angle of the massage module can be automatically adjusted so as to fit the natural form of the back of a human body which is staggered and uneven, thereby ensuring that different positions of the back obtain the best massage effect;

4) the self-adjusting support is also provided with an elastic connecting piece, so that the cushioning effect is achieved, the massage force is moderate while the back curve is tightly attached to the back massage, and the injury to the human body is prevented.

Drawings

Fig. 1 is a schematic perspective view of a back rolling massage device according to the present invention.

FIG. 2 is a schematic view of a connection structure of a lead screw nut and a lead screw according to the present invention.

Fig. 3 is a schematic view of a connection structure of the lead screw and related components.

Fig. 4 is a schematic perspective view of the connection frame according to the present invention.

Fig. 5 is a schematic perspective view of the massage module of the present invention.

Fig. 6 is a schematic structural view of the swing arm of the present invention.

Fig. 7 is a view a-a in fig. 6.

Fig. 8 is a view from direction B in fig. 7.

In the figure: 1. the device comprises a door-shaped frame 2, a lead screw 3, a supporting plate 4, a bearing seat 5, a stepping motor 6, a stepping motor controller 7, a nut fixing seat 8, a sliding connecting frame 8-1, a top plate 8-2, a sliding sleeve 8-3, a sliding rod 8-4, a screw rod 8-5, an adjusting nut 8-6, a baffle 9, a fishbone-shaped support 9-1, a central rod 9-2, an arc rod 10, a swing frame 10-1, an inverted U-shaped frame 10-2, a spring 10-3, a connecting rod 10-4, an upper swing shaft 10-5, a lower swing shaft 10-6, a swing arm 10-7, a hinge bolt 11, a plum blossom roller 12, a lead screw nut 13, an end bolt 14, a bearing 15, a bearing end cover 16, a coupler 17, a motor seat 18 and a connecting.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the massage device for rolling back according to the present invention comprises a supporting frame, a self-adjusting bracket, a translation mechanism and a plurality of massage modules; the support frame consists of 2 door-shaped frames 1 arranged side by side, and the translation mechanism consists of a stepping motor 5, a lead screw 2 and a lead screw nut 12; the screw rod 2 is arranged between the cross beams of the 2 door-shaped frames 1, the screw rod 2 is rotatably connected with the door-shaped frames 1, and one end of the screw rod 2 is connected with the stepping motor 5; the massage modules are connected into a whole through a self-adjusting bracket, and the top of the self-adjusting bracket is in transmission connection with the screw rod 2 through a screw rod nut 12; under the drive of the stepping motor 5, the self-adjusting bracket drives the plurality of massage modules to synchronously reciprocate along the longitudinal direction of the screw rod 2; the bottom of the self-adjusting bracket is provided with a plurality of plum blossom-shaped rollers 11, and the self-adjusting bracket consists of a sliding connecting frame 8, a fishbone-shaped bracket 9 and a swing frame 10 which are sequentially connected from top to bottom; the height and the angle of the plum blossom idler wheel 11 can be automatically adjusted under the action of external force through the self-adjusting support.

The portal frame 1 consists of 2 upright posts and 1 cross beam, and the bottoms of the 2 upright posts are respectively provided with a supporting disk 3; the top of the upright post is welded and fixed with the corresponding end of the cross beam.

As shown in fig. 1 and 3, a bearing seat 4 is arranged in the middle of the cross beam, two ends of a lead screw 2 are respectively supported in shaft holes of the corresponding end bearing seats 4 through bearings 14, a bearing end cover 15 is arranged on the outer side of the bearing seat 4 corresponding to one end of the lead screw 2 to seal the shaft hole, and the other end of the lead screw 2 passes through the shaft hole of the other bearing seat 4 and is connected with an output shaft of a stepping motor 5 through a coupler 16; a sleeve-shaped motor base 17 is arranged on the outer side of the stepping motor 5, and the inner end of the motor base 17 is fixedly connected with the end part of the screw rod 2.

And a stepping motor controller 6 is arranged on the stepping motor 5.

As shown in fig. 2, a nut fixing seat 7 is arranged on the outer side of the screw nut 12, and a flange structure is arranged at one end of the screw nut 12 and connected with the nut fixing seat 7 through an end bolt 13; the bottom of the nut fixing seat 7 is provided with a footing which is fixedly connected with the self-adjusting support through a connecting bolt 18.

As shown in fig. 4, the sliding connection frame 8 is composed of a top plate 8-1, a screw 8-4 and a telescopic guide sleeve, the top of the top plate 8-1 is fixedly connected with a nut fixing seat 7, the screw 8-4 is arranged at the center of the bottom of the top plate 8-1, and the telescopic guide sleeves are respectively arranged at two sides of the screw 8-4; the telescopic guide sleeve is a sliding connection structure consisting of a sliding sleeve 8-2 and a sliding rod 8-3, the top end of the sliding sleeve 8-2 is fixedly connected with a top plate 8-1, the bottom end of the sliding rod 8-3 is fixedly connected with a central rod 9-1 of a fishbone-shaped support 9, and the top of the sliding rod 8-3 extends into the sliding sleeve 8-2; the lower end of the screw 8-4 penetrates through a central rod 9-1 of the fishbone-shaped support 9, adjusting nuts 8-5 are respectively arranged on the screw 8-4 at two sides of the central rod 9-1, and a blocking piece 8-6 is arranged at the bottom end of the screw 8-4.

The fishbone-shaped support 9 consists of a central rod 9-1 and a plurality of arc-shaped rods 9-2, wherein the arc-shaped rods 9-2 are symmetrically arranged on two sides of the central rod 9-1, and a plurality of arc-shaped rods are longitudinally arranged along the central rod 9-1.

As shown in fig. 5, the swing frame 10 is composed of an inverted U-shaped frame 10-1 and a roller frame; the middle part of an inverted U-shaped frame 10-1 is fixedly connected with the bottom end of an arc-shaped rod 9-2, two ends of the inverted U-shaped frame 10-1 are respectively connected with 1 roller frame, each roller frame consists of 1T-shaped frame, 2L-shaped swing arms 10-6 (shown in figure 6) and 2 lower swing shafts 10-5, each T-shaped frame consists of an upper swing shaft 10-4 and a connecting rod 10-3, each connecting rod 10-3 is in sliding connection with one end of the inverted U-shaped frame 10-1 through a sleeve structure, and a spring 10-2 is arranged in each sleeve structure; the lower rotating shaft 10-5 is parallel to the upper swinging shaft 10-4 and is arranged at two sides below the upper swinging shaft; the middle part of the L-shaped swing arm 10-6 is connected with the corresponding end of the upper swing shaft 10-4 through a hinge bolt 10-7, and the two ends of the L-shaped swing arm 10-6 are respectively hinged with the corresponding ends of the lower rotating shaft 10-5.

As shown in fig. 7 and 8, two ends of the upper swing shaft 10-4 extend into shaft holes formed at corresponding ends of the L-shaped swing arm 10-6, the two ends are connected through keys, a key groove is formed at the top of the shaft hole on the L-shaped swing arm 10-6, and a central angle corresponding to the key groove is 90 degrees, that is, the L-shaped swing arm 10-6 can only swing within 45 degrees at two sides of a vertical axis; the outer side of the L-shaped swing arm 10-6 is provided with a hinge bolt 10-7 connected with the end face of the upper swing shaft 10-4, and the joint is provided with a tubular anti-loosening rubber mat.

The plum blossom idler wheel 11 is a cylindrical body with a plum blossom-shaped cross section, the plum blossom idler wheel 11 is coaxially sleeved on the outer side of the lower rotating shaft 10-5 and can rotate around the axis of the lower rotating shaft 10-5; the plum blossom roller 11 is made of silica gel.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[ examples ] A method for producing a compound

In this embodiment, the supporting frame of the back rolling massage device is a frame structure supported by four feet, the translation mechanism is located on the upper portion of the supporting frame, the self-adjusting support is used for connecting the translation mechanism and 6 massage modules, the 6 massage modules are arranged in 2 rows × 3 columns, each massage module is provided with 2 plum blossom rollers 11 in tandem along the moving direction, and the stepping motor 5 is a DM542 type stepping motor.

When in use, the supporting frame is fixed on a bed or a floor. Starting a stepping motor 5, providing power through the stepping motor 5 to drive a lead screw 2 to rotate, and controlling a rotation mode of driving the lead screw 2 by the stepping motor 5 through a stepping motor controller 6; when the screw rod 2 rotates, the screw rod nut 12 matched with the screw rod 2 is driven to move, so that the massage module is driven to reciprocate back and forth along the direction of the screw rod 2.

The stepping motor controller 6 controls the starting and stopping of the rotation of the screw rod 2, the rotating speed and the rotating direction through the stepping motor 5, and the screw rod nut 12 is matched with the screw rod 2 to transfer motion, so that the massage module can move back and forth along the longitudinal direction of the screw rod 2. The self-adjusting bracket has the functions of height adjustment and angle adjustment, and when the self-adjusting bracket is used, the plum blossom idler wheel 11 is manually adjusted to the height of contacting with the back of a user through visual observation. During adjustment, 2 adjusting nuts 8-5 on the screw rod 8-4 are loosened, the position of the central rod 9-1 on the screw rod 8-4 is adjusted, and after the adjustment is completed, the adjusting nuts 8-5 are locked, so that the central rod 9-1 stays at a proper height. The telescopic guide sleeve plays a role in guiding when the height is adjusted, and the bottom of the screw 8-4 is provided with a baffle 8-6 to prevent the central rod 9-1 from being separated from the screw 8-4. The swing span 10 with the triangular truss structure is provided with the plum blossom idler wheel 11, so that the angle adjustment can be realized, and the plum blossom idler wheel 11 is ensured to be attached to the back of a human body at any time. The massage function is realized by different pressure feelings caused by the concave-convex surface on the plum blossom idler wheel 11.

The massage module realizes the massage to the back of the human body through reciprocating movement back and forth along the screw rod 2, different people have different fat and thin bodies, simultaneously the curve height of the back of the human body is staggered, and the massage force and the attaching degree of the massage force and the massage part are realized by a spring 10-2 arranged in the swing frame 10. The plum blossom gyro wheel 11 is the silica gel material, directly contacts with human back, and along with the change of human back curve form, the motion curve of plum blossom gyro wheel 11 also has the height and breadth.

The upper swing shaft 10-4 is provided with a protruding key so as to be matched with a key groove in a shaft hole at the corresponding end of the L-shaped swing arm 10-6, the key groove has a central angle of 90 degrees, namely, the key is allowed to have a rotating space of 90 degrees around the shaft in the key groove, so that the L-shaped swing arm 10-6 can swing within a set range, and the phenomenon that the L-shaped swing arm overturns due to overlarge swing amplitude is avoided. The purpose of the swing is to enable the 2 plum blossom rollers 11 arranged at the front and the back of the same swing frame 10 to be capable of carrying out real-time angle adjustment according to the back angle of the human body.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A back rolling massage device is characterized by comprising a supporting frame, a self-adjusting bracket, a translation mechanism and a plurality of massage modules; the support frame consists of 2 door-shaped frames arranged side by side, and the translation mechanism consists of a stepping motor, a lead screw and a lead screw nut; the lead screw is arranged between the cross beams of the 2 door-shaped frames, the lead screw is rotatably connected with the door-shaped frames, and one end of the lead screw is connected with the stepping motor; the massage modules are connected into a whole through a self-adjusting bracket, and the top of the self-adjusting bracket is in transmission connection with a lead screw through a lead screw nut; under the driving of the stepping motor, the self-adjusting bracket drives the plurality of massage modules to synchronously reciprocate along the longitudinal direction of the screw rod; the bottom of the self-adjusting support is provided with a plurality of plum blossom-shaped rollers, and the self-adjusting support consists of a sliding connecting frame, a fishbone-shaped support and a swinging frame which are sequentially connected from top to bottom; the height and the angle of the plum blossom idler wheel can be automatically adjusted under the action of external force through the self-adjusting support.

2. The back rolling massage device of claim 1, wherein the portal frame is composed of 2 columns and 1 beam, and the bottom of each of the 2 columns is provided with a support plate; the top of the upright post is welded and fixed with the corresponding end of the cross beam.

3. The back rolling massage device according to claim 2, wherein a bearing seat is arranged in the middle of the cross beam, two ends of the lead screw are respectively supported in the shaft holes of the bearing seats at the corresponding ends through bearings, a bearing end cover is arranged outside the bearing seat corresponding to one end of the lead screw to seal the shaft hole, and the other end of the lead screw passes through the shaft hole of the other bearing seat and is connected with the output shaft of the stepping motor through a coupler; the outer side of the stepping motor is provided with a sleeve-shaped motor base, and the inner end of the motor base is fixedly connected with the end part of the lead screw.

4. A back-rolling massage device according to claim 1 or 3, wherein a stepping motor controller is provided on said stepping motor.

5. The back rolling massage device as claimed in claim 1, wherein a nut fixing seat is provided at an outer side of the screw nut, and a flange structure is provided at one end of the screw nut and connected with the nut fixing seat through an end bolt; the bottom of the nut fixing seat is provided with a bottom foot which is fixedly connected with the self-adjusting support through a connecting bolt.

6. The back rolling massage device according to claim 1 or 5, wherein the sliding connection frame comprises a top plate, a screw rod and a telescopic guide sleeve, the top of the top plate is fixedly connected with the nut fixing seat, the screw rod is arranged at the center of the bottom of the top plate, and the telescopic guide sleeves are respectively arranged at two sides of the screw rod; the telescopic guide sleeve is a sliding connection structure consisting of a sliding sleeve and a sliding rod, the top end of the sliding sleeve is fixedly connected with the top plate, the bottom end of the sliding rod is fixedly connected with the central rod of the fishbone-shaped support, and the top of the sliding rod extends into the sliding sleeve; the lower end of the screw rod penetrates through a central rod of the fishbone-shaped support, adjusting nuts are respectively arranged on the screw rods on two sides of the central rod, and a blocking piece is arranged at the bottom end of the screw rod.

7. The massage apparatus of claim 1 or 6, wherein the fishbone-shaped support comprises a central rod and a plurality of curved rods symmetrically disposed on both sides of the central rod and longitudinally disposed along the central rod.

8. The back-rolling massage device according to claim 1, wherein the swing frame is composed of an inverted U-shaped frame and a roller frame; the middle part of the inverted U-shaped frame is fixedly connected with the bottom end of the arc-shaped rod, two ends of the inverted U-shaped frame are respectively connected with 1 roller frame, each roller frame consists of 1T-shaped frame, 2L-shaped swing arms and 2 lower swing shafts, each T-shaped frame consists of an upper swing shaft and a connecting rod, each connecting rod is connected with one end of the inverted U-shaped frame in a sliding mode through a sleeve structure, and a spring is arranged in each sleeve structure; the lower rotating shaft is parallel to the upper swinging shaft and is arranged at two sides below the upper swinging shaft; the middle part of the L-shaped swing arm is connected with the corresponding end of the upper swing shaft through a hinge bolt, and the two ends of the L-shaped swing arm are respectively hinged with the corresponding ends of the lower rotating shaft.

9. The back-rolling massage device according to claim 8, wherein two ends of the upper swing shaft extend into shaft holes formed at corresponding ends of the L-shaped swing arms, the two ends are connected through a key, a key groove is formed at the top of the shaft hole on the L-shaped swing arm, and a central angle corresponding to the key groove is 90 degrees, namely the L-shaped swing arm can only swing within 45 degrees at two sides of the vertical axis; the outer side of the L-shaped swing arm is provided with a hinged bolt connected with the end face of the upper swing shaft, and the joint is provided with a tubular anti-loosening rubber mat.

10. The back-rolling massage device as claimed in claim 8, wherein the quincunx roller is a cylindrical body with a quincunx cross section, and the quincunx roller is coaxially sleeved outside the lower rotating shaft and can rotate around the axis thereof along with the lower rotating shaft; the material of plum blossom gyro wheel is silica gel.