JP3053450U - caster - Google Patents

Abstract

(57) [Summary] [Problem] A caster that exhibits a brake state when a downward pressure is applied. SOLUTION: One wheel seat 10 has a vertical active groove 12 formed in the wheel seat 10, and circular concave arc-shaped friction portions 18 are formed on both sides of the active groove 12. ,
An active part 21 is formed as one wheel axle 20, and the active part 21 is combined into the active groove 12 of the wheel seat 10 so as to be able to move up and down, and two ring bodies 30 are formed. The two axles 30 connected to both ends of the axle 20
The upper end of the wheel axle corresponds to the friction portions 18 on both sides of the wheel seat 10, and one interlocking seat 40, one end of which is connected to the wheel seat 10, and the other end is formed with a free end. 2
A caster that is combined with the one that is connected to zero and one elastic member 50 that is installed between the free end of the wheel seat 10 and the free end of the interlocking seat 40.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a type of caster, particularly one suitable for mounting on a chair bottom.

[0002]

[Prior art]

 Some known chairs are provided with a free wheel or caster at the bottom. It is provided with a wheel set so as to penetrate the wheel seat, two wheels are connected to the wheel set, and one brake seat is further combined, and the relative movement between the wheel seat and the wheel is used. In this way, the wheelset can be moved, and the inner surface of the wheel can be locked or unlocked by the brake seat.

[0003] The above-described conventional caster structure exhibits a brake release state, that is, a slidable state when receiving a downward pressure, and a braking state when no downward pressure is received. As a result, when the child stood on the chair, the casters were released, the chair slipped, and the infant fell off the chair and could be injured.

[0004] Therefore, the above-mentioned conventional casters have inconveniences and disadvantages in practical use, and improvement thereof has been awaited.

[0005]

[Problems to be solved by the invention]

 The present invention has been made to improve the above-mentioned drawbacks of the conventional casters. Specifically, the present invention has an object to provide a kind of caster, which comprises a wheel seat, a wheel axle, and a wheel body. When a downward pressure action is applied, the wheel seat moves downward to bring the upper ends of the two wheel bodies into contact with both friction parts of the wheel seat, and the friction between the wheel body and the wheel seat The caster is brought into a braking state by the frictional force generated by the part, and the caster assumes the braking state when receiving downward pressure, so that when the child stands on the chair, the caster assumes the braking state, so that the chair assumes the braking state. It shall not slip and prevent the child from falling off the chair and being injured.

[0006]

[Means for Solving the Problems]

 According to the invention of claim 1, a single wheel seat 10 is formed, a vertical active groove 12 is formed in the wheel seat 10, and circular concave arc-shaped friction portions 18 are formed on both sides of the active groove 12. An active part 21 is formed as one wheel axle 20, and the active part 21 is vertically combined with the active part 21 in the active groove 12 of the wheel seat 10. The two ends of the two ring bodies 30 correspond to the friction portions 18 on both sides of the wheel seat 10, and one interlocking seat 40 is formed. A free end is formed at the other end, which is connected to the seat 10, and is connected to the wheel shaft 20. One elastic member 50 is provided between the free end of the wheel seat 10 and the free end of the interlocking seat 40. It is a caster that is composed of all of the above.

According to a second aspect of the present invention, in the caster according to the first aspect, a coupling portion 11 is formed at an upper end portion of the wheel seat 10, and the coupling portion 11 can be coupled to a bottom of a chair. It is a caster characterized by the following.

According to a third aspect of the present invention, in the caster according to the first aspect, one positioning member 16 is provided on the wheel seat 10, and a free end of the interlocking seat 40 is located above the positioning member 16. It is a caster characterized by doing.

According to a fourth aspect of the present invention, there is provided the caster according to the first aspect, wherein the wheel seat 10 and the interlocking seat 40 are respectively provided with one fixed column 17, 43, and both ends of the elastic member 50 are provided at the wheel seat 10 And fixed to the fixed columns 17 and 43 of the interlocking seat 40.

According to a fifth aspect of the present invention, in the caster according to the first aspect, a coupling hole 41 is provided in the interlocking seat 40, and the active portion 21 of the wheel set 20 is connected to the coupling hole 41 of the interlocking seat 40. The caster is characterized in that the interlocking seat 40 is connected to the wheel shaft 20 by penetrating therethrough.

[0011]

[Embodiment of the invention]

 As shown in FIGS. 1, 2, 3 and 4, the caster provided by the present invention has a structure suitable for attachment to the bottom of a chair, which includes one wheel seat 10, one wheel axle 20 and one wheel axle 20. , Two ring bodies 30, one interlocking seat 40 and one elastic member 50. At the upper end of the wheel seat 10 therein, one connecting portion 11 is provided so as to protrude and is used for connecting to the bottom of the chair. A vertical active groove 12 is formed in the wheel seat 10, and perforations 13 and 14 are provided on both front and rear sides of the active groove 12, respectively. The perforations 13 and 14 are each provided with one connecting member 15 and one positioning member. It is connected to the member 16. A single fixed column 17 is provided in the wheel seat 10, and circular concave arc-shaped friction portions 18 are formed on both left and right sides of the wheel seat 10.

The wheel axle 20 has a substantially columnar shape, and a square columnar active portion 21 is formed in the middle thereof. The wheel axle 20 is combined with the active groove 12 of the wheel seat 10 so that the wheel axle 20 can move up and down freely.

The ring body 30 is a circular ring body, one coupling hole 31 is provided at the center thereof, and the two ring bodies 30 are coupled to both sides of the wheel shaft 20 with the coupling holes 31 to be rotatable. The two wheels 30 are combined on the left and right sides of the wheel, and the upper ends of the two wheels 30 correspond to the friction portions 18 on the left and right sides of the wheel seat 10.

The interlocking seat 40 is provided with a rectangular coupling hole 41, a connecting hole 42 is provided on one side of the coupling hole 41, and a fixed column 43 is provided on the other side. One end of the interlocking seat 40 is connected to the connecting member 15 of the wheel seat 10 through a connecting hole 42, and a free end is formed at the other end of the interlocking seat 40, so that it can swing freely around the connecting member 15 as a fulcrum. ing. The free end of the interlocking seat 40 is located above the positioning member 16, and the positioning member 16 appropriately restricts the downward swing of the free end of the interlocking seat 40. The active portion 21 of the wheel set 20 also penetrates the coupling hole 41 of the link seat 40 so that the link seat 40 is connected to the wheel set 20.

The elastic member 50 is a compression spring, which is disposed between the free ends of the wheel seat 10 and the interlocking seat 40, and both ends of the elastic member 50 are fixed to the fixed column 17 of the wheel seat 10 and the interlocking seat 40, respectively. It is fixed to a pillar 43. Thus, the caster of the present invention is configured.

As shown in FIG. 4, when no person is sitting on the chair, the chair does not receive downward pressure, and the free end of the interlocking seat 40 moves downward due to the elasticity of the elastic member 50. The wheel set 20 also moves downward in conjunction with the seat 40, and the wheel set 20 moves the two wheel bodies 30 downward until the free end of the link seat 40 abuts against the positioning member 16. The two wheel bodies 30 are rotatable while maintaining an appropriate distance from the friction portions 18 on both the left and right sides of the wheel seat 10, that is, the casters are in the brake release state.

As shown in FIG. 5, when a person sits on the chair, the chair receives a downward pressure, and the wheel seat 10 also receives the pressure and moves downward. The upper end of the two wheel sets 20 comes into contact with the friction portions 18 on both sides of the wheel seat 10 by moving upward in the groove 12 and moving the free end of the interlocking seat 40 upward thereby to compress the elastic member 50. The caster is brought into a brake state by the friction force generated by the friction portion 18 between the wheel body 30 and the wheel seat 10. The present invention exhibits a braking condition when subjected to downward pressure, and therefore, the chair does not slide when the child stands on the chair, so that the chair does not slide and the child falls from the chair and is injured. Can be prevented.

[0018]

[Effect of the invention]

 The present invention exhibits a braking condition when subjected to downward pressure, and therefore, when the child stands on the chair, the casters exhibit the braking condition, so that the chair does not slide and the child falls from the chair and is injured. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is an exploded perspective view of the present invention.

FIG. 3 is a front view of the present invention.

FIG. 4 is a side view of the present invention.

FIG. 5 is a side view of the present invention in a braking state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wheel seat 11 Connection part 12 Active groove 13 Perforation 14 Perforation 15 Connecting member 16 Positioning member 17 Fixed column 18 Friction part 20 Wheel shaft 21 Active part 30 Ring body 31 Connection hole 40 Interlock seat 41 Connection hole 42 Connection hole 43 Fixed column 50 Elasticity Element

Claims (5)

[Utility model registration claims] 1. A single wheel seat 10, in which a vertical active groove 12 is formed in the wheel seat 10, and circular concave arc-shaped friction portions 18 are formed on both sides of the active groove 12. An active part 21 is formed as one wheel axle 20, and the active part 21 is vertically combined with the active groove 12 of the wheel seat 10 in the active groove 12; The two ends of the ring 30 are connected to both ends of the wheel set 20, and the upper ends of the two ring bodies 30 correspond to the friction portions 18 on both sides of the wheel seat 10. Connected to
The other end has a free end formed therein and is connected to the wheel set 20; and one elastic member 50 is provided between the free end of the wheel seat 10 and the free end of the interlocking seat 40. A caster composed of 2. The caster according to claim 1, wherein
A caster, wherein a coupling portion 11 is formed at an upper end portion of the wheel seat 10, and the coupling portion 11 can be coupled to a bottom portion of the chair. 3. The caster according to claim 1, wherein
A caster, wherein one positioning member 16 is provided on the wheel seat 10, and a free end of the interlocking seat 40 is located above the positioning member 16. 4. The caster according to claim 1, wherein
One fixed pillar 17, 43 is provided on each of the wheel seat 10 and the interlocking seat 40, and both ends of the elastic member 50 are connected to the wheel seat 1
A caster, which is fixed to the fixed columns 17 and 43 of the interlocking seat 40 with 0. 5. The caster according to claim 1, wherein
A coupling hole 41 is provided in the interlocking seat 40, and the
A caster, characterized in that the active portion 21 of the vehicle extends through the coupling hole 41 of the interlocking seat 40 so that the interlocking seat 40 is connected to the wheel shaft 20.