JP3101121U - Office chair casters - Google Patents

Abstract

An object of the present invention is to provide a caster for an office chair so as to prevent noise at the time of rotating the caster and at the same time to smooth the rotation.
The caster holder comprises a caster holder, two casters, two rolling ball holders, and two rolling ball portions. Each of the rolling balls of the rolling ball portion has a convex shape. By rolling between the groove 22 on the part 21 and the groove 31 in the bore 30 of the caster 3, the contact area when the caster 3 rotates with respect to the caster holder 2 is minimized.
[Selection] Figure 2

Description

  The present invention relates to a caster of an office chair, and in particular, a rolling ball is provided between a groove on a convex portion of a caster holder and a groove in a perforation of a caster to use the rolling to rotate the caster with respect to the caster holder. The present invention relates to a caster for an office chair in which the contact area when the caster rotates is reduced, the frictional force is minimized to prevent the generation of noise, and the rotation is smooth.

  As shown in FIG. 1, in the caster of a known office chair, a caster holder 10 is mainly provided, a pivotal holder 11 is provided on the caster holder 10, and a wheel shaft 14 is mounted on a shaft seat. 12, the two ends of the wheel shaft 14 protrude from both sides of the shaft seat 12, and concave grooves 15 are provided near both ends of the wheel shaft 14, and two casters 16 are provided. Assembled on both sides of the shaft seat 12, a convex column 17 is provided inside the caster 16, a shaft hole 18 is provided in the convex column 17, and a convex hole is formed in the shaft hole 18. An edge 19 is provided, and both ends of the wheel axle 14 are fitted into a shaft hole 18 of the caster 16 so that the convex edge 19 is fitted into a concave groove 15 of the wheel axle 14, and the two The caster 16 is fixed in the caster holder 10. There is.

However, the above-mentioned known office chair casters have the following disadvantages. Because the caster wheel shaft is inserted into the shaft hole of the caster holder and serves as a support shaft connecting the two casters, the contact area between the wheel shaft and the shaft hole is large, so when the caster rotates In addition, the rotation of the wheel shaft causes friction with the inner wall of the shaft hole of the caster holder with the rotation of the shaft hole. Further, as described above, the caster cannot be rotated smoothly because the contact area is large and the frictional force is necessarily large.
In view of the above-mentioned drawbacks, an office chair caster according to the present invention is provided in order to prevent noise at the time of rotating the caster and to make the rotation smooth.

  A caster holder and two casters, and two rolling ball holders and two rolling ball portions, each rolling ball of the rolling ball portion being formed in a groove on a convex portion of the caster holder and in a perforation of the caster. Rolling between the grooves minimizes the contact area when the caster rotates with respect to the caster holder.

    According to the present invention, by installing a rolling ball or the like, the frictional force when the caster rotates in the caster holder is minimized, the noise caused by this is suppressed, and at the same time, the caster rotates smoothly. Successful.

As shown in FIGS. 2, 3 and 4, the present invention is provided with a caster holder 2, a pivot seat 20 is provided on the caster holder 2, and convex portions are provided on both sides of the caster holder 2. 21 are provided. Further, an arc-shaped groove 22 is provided on the convex portion 21, and a perforation 23 is provided in the caster holder 2. The two casters 3 are respectively provided on both sides of the caster holder 2, and the casters 3 are provided with perforations 30, and the inner wall surface of the perforations 30 has a groove 31 having an arc shape and a fitting hole. A groove 32 is provided.
Each of the two rolling ball holders 4 is provided in a bore 30 of the two casters 3, and a ring 40 is provided on a peripheral wall surface of the rolling ball holder 4. Are provided with rolling ball localization grooves 41 at the inside portions facing each other.
The two rolling ball portions 5 are set in the positioning grooves 41 of the rolling ball holder 4, and the rolling ball portion 5 is constituted by several rolling balls 50.

  At the time of assembling, first, as shown in FIGS. The rolling ball holder 4 is fixed in the caster 3 by being fitted and fitted in a fitting groove 32 in the caster 30, and the rolling balls 50 of the rolling ball portion 5 are respectively located in the positioning grooves of the rolling ball holder 4. The rolling ball 50 is installed in the positioning groove 41 of the rolling ball holder 4 and the rolling ball 50 is located in the groove 31 of the caster 3. Finally, the two casters 3 are placed on both sides of the caster holder 2 so as to face each other, the rolling balls 50 are arranged in the grooves 22 of the convex portions 21 of the caster holder 2, and the rolling balls 50 are By storing the casters 3 in the grooves 22 of the holder 2 and the grooves 31 of the casters 3, the casters 3 are installed on both sides of the caster holder 2 to complete the assembly.

  In use, the rolling ball 50 of the rolling ball portion 5 rolls between the groove 22 on the convex portion 21 of the caster holder 2 and the groove 31 in the perforation 30 of the caster 3, so that the caster 3 is When the caster 3 rotates with respect to the holder 2 and the caster 3 rotates, the contact area with the caster holder 2 is small, that is, the friction area is reduced, so that generation of noise is suppressed, and Due to the rolling of the rolling ball 50, the rotation of the caster 3 becomes smooth.

It is a three-dimensional exploded view of a caster in a known office chair. FIG. 3 is an exploded view of the present invention. FIG. 3 is a three-dimensional view after assembly in the present invention. FIG. 4 is a cross-sectional view after assembly in the present invention.

Explanation of reference numerals

Reference Signs List 10 caster holder 11 pivot holder 12 shaft seat 13 shaft hole 14 wheel shaft 15 concave groove 16 caster 17 convex column 18 shaft hole 19 convex edge 2 caster holder 20 pivot contact holder 21 convex portion 22 groove 23 perforation 3 caster 30 perforation 31 groove 32 Fitting groove 4 Rolling ball holder 40 Ring 41 Positioning groove 5 Rolling ball part 50 Rolling ball

Claims (1)

Castor holder, two casters, two rolling ball holders, two rolling ball portion, in the office chair caster configured,
A caster holder provided with a pivot holder, a convex portion having a groove on each side, and a perforation provided inside,
The two casters provided on both sides of the caster holder, each having a hole, and having a groove and a fitting groove on an inner wall surface of the hole,
The two rolling ball holders installed in the perforations of the two casters, further provided with a ring on the wall surface, and provided with a stereotactic groove on the inside facing each other;
The two rolling ball portions, which are installed in the localization grooves of the rolling ball holder and are composed of several rolling balls,
Utilizing the fact that several rolling balls of the rolling ball portion roll between the groove on the convex portion of the caster holder and the groove in the perforation of the caster, so that the caster is attached to the caster holder. A caster for an office chair, characterized in that noise generated by minimizing a contact area when rotating, that is, a frictional area, is reduced, and that the caster rotates smoothly.

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