US20070284932A1 - Castor axle having noise suppression function - Google Patents
Castor axle having noise suppression function Download PDFInfo
- Publication number
- US20070284932A1 US20070284932A1 US11/451,013 US45101306A US2007284932A1 US 20070284932 A1 US20070284932 A1 US 20070284932A1 US 45101306 A US45101306 A US 45101306A US 2007284932 A1 US2007284932 A1 US 2007284932A1
- Authority
- US
- United States
- Prior art keywords
- axle
- snap ring
- annular groove
- shaped snap
- leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 235000004443 Ricinus communis Nutrition 0.000 title claims abstract description 21
- 230000001629 suppression Effects 0.000 title description 2
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000005452 bending Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/006—Chair or stool bases with castors
Definitions
- the present invention relates to a castor axle and, more particularly, to a castor axle for a chair.
- a conventional chair in accordance with the prior art shown in FIG. 4 comprises a leg 12 having an inside formed with a mounting hole 120 , a castor 10 pivotally mounted on the leg 12 and having an end portion provided with an axle 11 mounted in the mounting hole 120 of the leg 12 and having an upper end formed with an annular groove 110 , and a substantially C-shaped snap ring 13 mounted in the annular groove 110 of the axle 11 and rested on the peripheral wall of the mounting hole 120 of the leg 12 .
- the C-shaped snap ring 13 slips in the annular groove 110 of the axle 11 during movement of the castor 10 , so that the C-shaped snap ring 13 easily rubs the peripheral wall of the mounting hole 120 of the leg 12 , thereby producing noise due to friction between the C-shaped snap ring 13 and the leg 12 during movement of the castor 10 .
- the C-shaped snap ring 13 is not compressible elastically upward and downward, so that the contact face between the C-shaped snap ring 13 and the annular groove 110 of the axle 10 is changed to a contact point by pressing of the gravity force during a long-term utilization to form a clearance between the C-shaped snap ring 13 and the annular groove 110 of the axle 10 , thereby producing noise due to hit between the C-shaped snap ring 13 and the annular groove 110 of the axle 10 when the user is seated on the chair.
- a chair comprising a leg having an inside formed with a mounting hole, a castor pivotally mounted on the leg and having an end portion provided with an axle mounted in the mounting hole of the leg, the axle of the castor having an upper end formed with an annular groove, and a substantially S-shaped snap ring mounted in the annular groove of the axle and rested on a peripheral wall of the mounting hole of the leg.
- the primary objective of the present invention is to provide a castor axle having a noise suppression function.
- Another objective of the present invention is to provide a chair, wherein the S-shaped snap ring has two end portions rested on the upper wall and the lower wall of the annular groove of the axle respectively and has an outer periphery rested on the peripheral wall of the mounting hole of the leg elastically, so that the axle of the castor is connected to the leg rigidly and stably.
- a further objective of the present invention is to provide a chair, wherein the S-shaped snap ring having a curved bending shape is enclosed around a peripheral wall of the annular groove of the axle and rested between the upper wall and the lower wall of the annular groove, so that the S-shaped snap ring will not slip in the annular groove of the axle to prevent from producing noise due to friction between the S-shaped snap ring and the leg during movement of the castor.
- a further objective of the present invention is to provide a chair, wherein the S-shaped snap ring has a curved bending shape and is compressible elastically upward and downward, so that the contact face between the S-shaped snap ring and the annular groove of the axle is not changed by pressing of the gravity force during a long-term utilization, thereby enhancing the lifetime of the S-shaped snap ring.
- FIG. 1 is a partially perspective view of a chair in accordance with the preferred embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the chair as shown in FIG. 1 .
- FIG. 3 is a partially plan cross-sectional view of the chair as shown in FIG. 1 .
- FIG. 4 is a partially plan cross-sectional view of a conventional chair in accordance with the prior art.
- a chair in accordance with the preferred embodiment of the present invention comprises a leg 2 , and a castor 3 pivotally mounted on the leg 2 .
- the leg 2 has an inside formed with a mounting hole 20 .
- the castor 3 has an end portion provided with an axle 30 mounted in the mounting hole 20 of the leg 2 .
- the axle 30 of the castor 3 has an upper end formed with an annular groove 300 for mounting a substantially S-shaped snap ring 4 which is rested on a peripheral wall of the mounting hole 20 of the leg 2 .
- the annular groove 300 of the axle 30 has an upper wall 301 and a lower wall 302 .
- the S-shaped snap ring 4 has a curved bending shape.
- the S-shaped snap ring 4 is snapped into the annular groove 300 of the axle 30 and has two end portions 40 rested on the upper wall 301 and the lower wall 302 of the annular groove 300 of the axle 30 respectively.
- Each of the two end portions 40 of the S-shaped snap ring 4 has a curved bending shape.
- the S-shaped snap ring 4 has two end portions 40 rested on the upper wall 301 and the lower wall 302 of the annular groove 300 of the axle 30 respectively and has an outer periphery rested on the peripheral wall of the mounting hole 20 of the leg 2 elastically, so that the axle 30 of the castor 3 is connected to the leg 2 rigidly and stably.
- the S-shaped snap ring 4 having a curved bending shape is enclosed around a peripheral wall of the annular groove 300 of the axle.
- the S-shaped snap ring 4 has a curved bending shape and is compressible elastically upward and downward, so that the contact face between the S-shaped snap ring 4 and the annular groove 300 of the axle 30 is not changed by pressing of the gravity force during a long-term utilization, thereby enhancing the lifetime of the S-shaped snap ring 4 .
Landscapes
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
A chair includes a leg having a mounting hole, a castor having an end portion provided with an axle mounted in the mounting hole of the leg, and a substantially S-shaped snap ring mounted in the annular groove of the axle and rested on a peripheral wall of the mounting hole of the leg. Thus, the S-shaped snap ring is enclosed around the peripheral wall of the annular groove of the axle and rested between the upper wall and the lower wall of the annular groove, so that the S-shaped snap ring will not slip in the annular groove of the axle to prevent from producing noise due to friction between the axle of the castor and the leg during movement of the castor.
Description
- 1. Field of the Invention
- The present invention relates to a castor axle and, more particularly, to a castor axle for a chair.
- 2. Description of the Related Art
- A conventional chair in accordance with the prior art shown in
FIG. 4 comprises aleg 12 having an inside formed with amounting hole 120, acastor 10 pivotally mounted on theleg 12 and having an end portion provided with an axle 11 mounted in themounting hole 120 of theleg 12 and having an upper end formed with anannular groove 110, and a substantially C-shaped snap ring 13 mounted in theannular groove 110 of the axle 11 and rested on the peripheral wall of themounting hole 120 of theleg 12. - However, the C-shaped snap ring 13 slips in the
annular groove 110 of the axle 11 during movement of thecastor 10, so that the C-shaped snap ring 13 easily rubs the peripheral wall of themounting hole 120 of theleg 12, thereby producing noise due to friction between the C-shaped snap ring 13 and theleg 12 during movement of thecastor 10. In addition, the C-shaped snap ring 13 is not compressible elastically upward and downward, so that the contact face between the C-shaped snap ring 13 and theannular groove 110 of theaxle 10 is changed to a contact point by pressing of the gravity force during a long-term utilization to form a clearance between the C-shaped snap ring 13 and theannular groove 110 of theaxle 10, thereby producing noise due to hit between the C-shaped snap ring 13 and theannular groove 110 of theaxle 10 when the user is seated on the chair. - In accordance with the present invention, there is provided a chair, comprising a leg having an inside formed with a mounting hole, a castor pivotally mounted on the leg and having an end portion provided with an axle mounted in the mounting hole of the leg, the axle of the castor having an upper end formed with an annular groove, and a substantially S-shaped snap ring mounted in the annular groove of the axle and rested on a peripheral wall of the mounting hole of the leg.
- The primary objective of the present invention is to provide a castor axle having a noise suppression function.
- Another objective of the present invention is to provide a chair, wherein the S-shaped snap ring has two end portions rested on the upper wall and the lower wall of the annular groove of the axle respectively and has an outer periphery rested on the peripheral wall of the mounting hole of the leg elastically, so that the axle of the castor is connected to the leg rigidly and stably.
- A further objective of the present invention is to provide a chair, wherein the S-shaped snap ring having a curved bending shape is enclosed around a peripheral wall of the annular groove of the axle and rested between the upper wall and the lower wall of the annular groove, so that the S-shaped snap ring will not slip in the annular groove of the axle to prevent from producing noise due to friction between the S-shaped snap ring and the leg during movement of the castor.
- A further objective of the present invention is to provide a chair, wherein the S-shaped snap ring has a curved bending shape and is compressible elastically upward and downward, so that the contact face between the S-shaped snap ring and the annular groove of the axle is not changed by pressing of the gravity force during a long-term utilization, thereby enhancing the lifetime of the S-shaped snap ring.
- Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
-
FIG. 1 is a partially perspective view of a chair in accordance with the preferred embodiment of the present invention. -
FIG. 2 is an exploded perspective view of the chair as shown inFIG. 1 . -
FIG. 3 is a partially plan cross-sectional view of the chair as shown inFIG. 1 . -
FIG. 4 is a partially plan cross-sectional view of a conventional chair in accordance with the prior art. - Referring to the drawings and initially to
FIG. 1 , a chair in accordance with the preferred embodiment of the present invention comprises aleg 2, and acastor 3 pivotally mounted on theleg 2. - Referring to
FIGS. 1-3 , theleg 2 has an inside formed with amounting hole 20. Thecastor 3 has an end portion provided with anaxle 30 mounted in themounting hole 20 of theleg 2. Theaxle 30 of thecastor 3 has an upper end formed with anannular groove 300 for mounting a substantially S-shaped snap ring 4 which is rested on a peripheral wall of themounting hole 20 of theleg 2. Theannular groove 300 of theaxle 30 has anupper wall 301 and alower wall 302. The S-shaped snap ring 4 has a curved bending shape. The S-shaped snap ring 4 is snapped into theannular groove 300 of theaxle 30 and has twoend portions 40 rested on theupper wall 301 and thelower wall 302 of theannular groove 300 of theaxle 30 respectively. Each of the twoend portions 40 of the S-shaped snap ring 4 has a curved bending shape. - Accordingly, the S-
shaped snap ring 4 has twoend portions 40 rested on theupper wall 301 and thelower wall 302 of theannular groove 300 of theaxle 30 respectively and has an outer periphery rested on the peripheral wall of themounting hole 20 of theleg 2 elastically, so that theaxle 30 of thecastor 3 is connected to theleg 2 rigidly and stably. In addition, the S-shaped snap ring 4 having a curved bending shape is enclosed around a peripheral wall of theannular groove 300 of the axle. 30 and rested between theupper wall 301 and thelower wall 302 of theannular groove 300, so that the S-shaped snap ring 4 will not slip in theannular groove 300 of theaxle 30 to prevent from producing noise due to friction between the S-shaped snap ring 4 and theleg 2 during movement of thecastor 3. Further, the S-shaped snap ring 4 has a curved bending shape and is compressible elastically upward and downward, so that the contact face between the S-shaped snap ring 4 and theannular groove 300 of theaxle 30 is not changed by pressing of the gravity force during a long-term utilization, thereby enhancing the lifetime of the S-shaped snap ring 4. - Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
Claims (8)
1. A chair, comprising:
a leg having an inside formed with a mounting hole;
a castor pivotally mounted on the leg and having an end portion provided with an axle mounted in the mounting hole of the leg, the axle of the castor having an upper end formed with an annular groove;
a substantially S-shaped snap ring mounted in the annular groove of the axle and rested on a peripheral wall of the mounting hole of the leg.
2. The chair in accordance with claim 1 , wherein the annular groove of the axle has an upper wall and a lower wall, and the S-shaped snap ring has two end portions rested on the upper wall and the lower wall of the annular groove of the axle respectively.
3. The chair in accordance with claim 2 , wherein each of the two end portions of the S-shaped snap ring has a curved bending shape.
4. The chair in accordance with claim 1 , wherein the S-shaped snap ring has a curved bending shape.
5. The chair in accordance with claim 1 , wherein the S-shaped snap ring is snapped into the annular groove of the axle.
6. The chair in accordance with claim 1 , wherein the S-shaped snap ring has an outer periphery rested on the peripheral wall of the mounting hole of the leg elastically.
7. The chair in accordance with claim 1 , wherein the S-shaped snap ring is enclosed around a peripheral wall of the annular groove of the axle and rested between the upper wall and the lower wall of the annular groove, so that the S-shaped snap ring will not slip in the annular groove of the axle.
8. The chair in accordance with claim 1 , wherein the S-shaped snap ring is compressible elastically upward and downward.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/451,013 US20070284932A1 (en) | 2006-06-12 | 2006-06-12 | Castor axle having noise suppression function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/451,013 US20070284932A1 (en) | 2006-06-12 | 2006-06-12 | Castor axle having noise suppression function |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070284932A1 true US20070284932A1 (en) | 2007-12-13 |
Family
ID=38821163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/451,013 Abandoned US20070284932A1 (en) | 2006-06-12 | 2006-06-12 | Castor axle having noise suppression function |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070284932A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107031286A (en) * | 2017-05-23 | 2017-08-11 | 珠海格力电器股份有限公司 | Caster mounting structure and mobile air conditioner |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1879429A (en) * | 1931-03-13 | 1932-09-27 | Faultless Caster Co | Adjustable adapter for casters |
US2992803A (en) * | 1955-08-12 | 1961-07-18 | Harter Corp | Base or pedestal for chairs |
US4719664A (en) * | 1986-11-17 | 1988-01-19 | Shop-Vac Corporation | Swivable caster |
US6637072B2 (en) * | 2000-09-29 | 2003-10-28 | Formway Furniture Limited | Castored base for an office chair |
US20030223809A1 (en) * | 2002-05-29 | 2003-12-04 | Ford Motor Company | Snap ring |
US6748623B1 (en) * | 2002-11-27 | 2004-06-15 | Po-Chuan Tsai | Chair caster |
-
2006
- 2006-06-12 US US11/451,013 patent/US20070284932A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1879429A (en) * | 1931-03-13 | 1932-09-27 | Faultless Caster Co | Adjustable adapter for casters |
US2992803A (en) * | 1955-08-12 | 1961-07-18 | Harter Corp | Base or pedestal for chairs |
US4719664A (en) * | 1986-11-17 | 1988-01-19 | Shop-Vac Corporation | Swivable caster |
US6637072B2 (en) * | 2000-09-29 | 2003-10-28 | Formway Furniture Limited | Castored base for an office chair |
US20030223809A1 (en) * | 2002-05-29 | 2003-12-04 | Ford Motor Company | Snap ring |
US6748623B1 (en) * | 2002-11-27 | 2004-06-15 | Po-Chuan Tsai | Chair caster |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107031286A (en) * | 2017-05-23 | 2017-08-11 | 珠海格力电器股份有限公司 | Caster mounting structure and mobile air conditioner |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BINDER, JUERGEN;GOTTWICK, ULRICH;SCHAEFERT, ARTHUR;REEL/FRAME:017991/0557;SIGNING DATES FROM 20060524 TO 20060531 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |