TWM647086U - Automatic braking pressure roller - Google Patents

Abstract

An automatic braking pressure roller mainly includes: a wheel seat, a connecting rod used to connect the chair seat and the wheel seat, a wheel axle and two rollers; the wheel seat is provided with a C-shaped axle hole, and the wheel axle can be movable longitudinally fixed C In the C-shaped axle hole; the C-shaped axle hole is provided with a groove; a spring is provided in the groove, and the spring is arranged perpendicularly to the axle; the two ends of the spring touch the bottom of the groove and the axle respectively; the rollers are equipped with fitting parts, which are embedded in the axle hole. The joint part is tightly sleeved on the end of the wheel axle; the bottom surface of the wheel seat is provided with a brake pad; the brake pad includes two correspondingly arranged braking parts. When used, when you sit on the chair, the wheel axle presses the spring upward to make the roller roll; when leaving the chair, the elasticity of the spring makes the fitting part close to the braking part and assumes a static braking state; effectively preventing the chair from sliding away when sitting down. problem.

Description

Automatic braking pressure roller

This creation relates to seat rollers, specifically an automatic braking pressure roller.

In order to facilitate the movement of the seat, it is a very common design to install rollers under the seat of the seat. Although the seat with rollers is convenient to use, the person on the seat can move without leaving the seat. , but there are also risks; when you want to sit back after leaving the seat, the seat equipped with rollers is likely to move from the intended sitting position due to human inattention or environmental factors, resulting in a fall while sitting. risk.

At present, it is known that some rollers used on seats have an automatic braking function; that is, when no one sits on the seat, the rollers are in a static braking state. When a person sits on the seat, the weight of the human body causes the rollers to stop The applied pressure releases the brake and causes the roller to enter a rolling state; however, compared with ordinary rollers, rollers with automatic braking function are more complex in structure and higher in cost.

In view of this, the main purpose of this invention is to provide an automatic braking pressure roller, which mainly includes: a wheel base, a connecting rod for connecting the chair base and the wheel base, and a rotatably fixed on the wheel base. The wheel axle and two rollers respectively fixed at both ends of the wheel axle;

The wheel base is provided with a C-shaped wheel axle hole, and the wheel axle is longitudinally movably fixed in the C-shaped wheel axle hole;

There is a groove on the inside of the C-shaped axle hole; a spring is provided in the groove, and the spring is arranged vertically with the axle; one end of the spring resists the bottom of the groove, and the other end resists the groove. on the axle;

Each roller is provided with a fitting portion, which is tightly sleeved on the end of each corresponding wheel axle;

The bottom surface of the wheel base is provided with a brake pad; the brake pad includes two correspondingly arranged braking parts; the upper surface of each brake part engages with each corresponding fitting part when the corresponding roller is in a braking state. The outer surface of the

In a preferred implementation, each of the fitting parts is in the shape of a cylinder; and each of the braking parts is in an arc shape matching the corresponding fitting part.

In a preferred implementation, an anti-slip pad is provided on the upper surface of each braking part.

In a preferred implementation, the brake pad is fastened to the wheel base through two correspondingly provided self-tapping screws.

In a preferred implementation, a metal gasket is provided between the connecting rod and the wheel base.

When in use, the automatic braking pressure roller is installed on the chair seat. When no one is sitting on the chair, the spring uses its own elasticity to contact the wheel shaft, and the wheel shaft and the fitting part on the roller move downward in conjunction with each other, so that the outer surface of the fitting part The surface is in close contact with the upper surface of the braking part; the friction between the two brakes makes the roller in a stationary braking state; when a person sits on the chair, the weight of the human body causes the wheel axle to move with the fitting part on the roller upward, at this time, the wheel axle presses upward and the spring contracts, and the upper surface of the braking part is no longer close to the outer surface of the fitting part. When the braking is released, the roller is in a rolling state.

In order to facilitate the understanding of the content of this invention and the effects it can achieve, specific embodiments are listed in conjunction with the drawings, and the detailed description is as follows: Please refer to Figures 1 to 7, which shows an automatic braking pressure roller 1 provided in this invention. , mainly includes: a wheel seat 10, a connecting rod 11 for connecting the chair seat and the wheel seat 10, a wheel axle 12 rotatably fixed on the wheel seat 10, and two rollers 13 respectively fixed on both ends of the wheel axle 12 ;in

The wheel base 10 is provided with a C-shaped axle hole 101, and the wheel axle 12 is longitudinally movably fixed in the C-shaped axle hole 101;

A groove 102 is provided on the inner upper side of the C-shaped axle hole 101; a spring 103 is provided in the groove 102, and the spring 103 is arranged perpendicularly to the axle 12; one end of the spring 103 resists the groove 102 bottom, the other end is against the axle;

Each roller 13 is provided with a fitting portion 131, which is tightly sleeved on the end of each corresponding wheel axle 12;

The bottom surface of the wheel base 10 is provided with a braking pad 14; the braking pad 14 includes two corresponding braking parts 141; the upper surface of each braking part 141 is in contact with each other when the corresponding roller 13 is in the braking state. The outer surface of the corresponding fitting portion 131 is in close contact with each other.

In practical application, the automatic braking pressure roller 1 of the invention is installed on the chair seat. When no one is sitting on the chair seat, the spring 103 in the groove 102 of the C-shaped axle hole 101 pushes outward against the axle through its own elasticity. 12. At this time, the outer surface of the fitting portion 131 of the roller 13 is pressed downwardly against the upper surface of the braking portion 141 of the brake pad 14. The friction force generated between the two makes the roller 13 in a stationary braking state; when a person sits on When getting on the seat, the wheel base 10 is forced downward, and the roller 13 is pressed against the ground, causing the wheel axle 12 to push back upward and the spring 103 is retracted. At this time, the outer surface of the fitting portion 131 of the roller 13 is in contact with the braking portion 141 of the brake pad 14 The upper surface of the chair moves from close contact to separation, allowing the roller 13 to be in a movable rolling state; through a simple structure, the roller 13 on the seat is in a stationary state when no one is riding, and when people are close to the seat, the roller 13 is in a stationary state. It will not slide due to accidental contact with the seat, making it safer for people to sit empty.

In a preferred implementation, as shown in FIGS. 2 to 7 , each fitting portion 131 is in the shape of a cylinder; each braking portion 141 is in an arc shape matching the corresponding fitting portion 131 . The combination of the cylinder and the arc increases the friction contact area, making the braking state more stable.

In a preferred implementation, as shown in FIGS. 2 to 7 , an anti-slip pad is provided on the upper surface of each braking part 141 . The additional anti-slip pad can increase the friction force when the braking part 141 contacts the fitting part 131, making the braking state more stable.

In a preferred implementation, as shown in Figures 2 to 7, the brake pad 14 is fastened to the wheel base 10 through two corresponding self-tapping screws 15. The brake pad 14 is fixed through self-tapping screws 15 to make it more secure and prevent it from loosening.

In a preferred implementation, as shown in FIGS. 2 to 7 , a metal gasket 16 is provided between the connecting rod 11 and the wheel base 10 . The added metal gasket 16 structure adds a buffer to the friction between the connecting rod 11 and the wheel seat 10, making the service life longer and more durable.

Compared with the existing technology, the automatic braking pressure roller 1 of the present invention is more streamlined in structure. Through the elasticity of the spring 103, it can push against the wheel axle 12 when no one is riding on it, so that the braking part 141 and the fitting part 131 are in close contact. , the roller 13 is in a braking state; when a person wants to sit on it, the seat will not slide and cause the danger of sitting empty; after sitting on the seat, the spring 103 is back-pressed by the weight of the human body, and the roller 13 is in a rolling state, restoring the seat to the normal position. Easy to move while riding.

To sum up, this invention is novel and practical and fully meets the patent requirements, and a new patent application is filed. However, the above are only preferred embodiments of this invention and should not be used to limit the scope of implementation of this invention; therefore, all equivalent changes and modifications made based on the patent scope of this invention and the content of the invention specification shall be It is within the scope of this creative patent.

1: Automatic braking pressure roller 10: Wheel base 101:C type axle hole 102: Groove 103:Spring 11:Connecting rod 12: Axle 13:Roller 131: Chimeric part 14:brake pad 141:braking part 15:Self-tapping screws 16:Metal gasket

Figure 1 Schematic diagram of the automatic braking pressure roller of this invention. Figure 2 is an exploded schematic diagram of the structure of the automatic braking pressure roller of this invention. Figure 3 is a top view of the automatic braking pressure roller of this invention. Figure 4 is a cross-sectional view in the A-A direction when the automatic braking pressure roller of the present invention is in the braking state in Figure 3. Figure 5 is a cross-sectional view in the B-B direction when the automatic braking pressure roller of the present invention is in the braking state in Figure 3. Figure 6 is a cross-sectional view in the A-A direction when the automatic braking pressure roller of the present invention is in the rolling state in Figure 3. Figure 7 is a cross-sectional view taken along the B-B direction when the automatic braking pressure roller of the present invention is in the rolling state in Figure 3.

1: Automatic braking pressure roller

10: Wheel base

101:C type axle hole

103:Spring

11:Connecting rod

12: Axle

13:Roller

131: Chimeric part

14:brake pad

141:braking part

15:Self-tapping screws

16:Metal gasket

Claims (5)

An automatic braking pressure roller mainly includes: a wheel seat, a connecting rod for connecting the chair seat and the wheel seat, a wheel axle rotatably fixed on the wheel seat, and two rollers respectively fixed on both ends of the wheel axle; The wheel base is provided with a C-shaped axle hole, and the wheel axle can be longitudinally movably fixed in the C-shaped axle hole; a groove is provided on the inside and upper side of the C-shaped axle hole; and there is a groove inside the groove. There is a spring, and the spring is arranged perpendicularly to the wheel axle; one end of the spring resists the bottom of the groove, and the other end resists the wheel axle; each roller is provided with a fitting part, and the fitting part is fastened The bottom surface of the wheel seat is provided with a brake pad; the brake pad includes two corresponding brake parts; the upper surface of each brake part is on each corresponding roller. When in the braking state, it is in close contact with the outer surface of each corresponding fitting part. The automatic braking pressure roller according to claim 1, wherein each of the fitting parts is in the shape of a cylinder; and each of the braking parts is in an arc shape matching the corresponding fitting part. The automatic braking pressure roller according to claim 2, wherein an anti-slip pad is provided on the upper surface of each braking part. The automatic braking pressure roller according to any one of claims 1 to 3, wherein the brake pad is fastened to the wheel base through two correspondingly provided self-tapping screws. The automatic braking pressure roller of claim 4, wherein a metal gasket is provided between the connecting rod and the wheel base.