GB2123772A - Mirror base for an internal rear view mirror - Google Patents

Mirror base for an internal rear view mirror Download PDF

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Publication number
GB2123772A
GB2123772A GB08318078A GB8318078A GB2123772A GB 2123772 A GB2123772 A GB 2123772A GB 08318078 A GB08318078 A GB 08318078A GB 8318078 A GB8318078 A GB 8318078A GB 2123772 A GB2123772 A GB 2123772A
Authority
GB
United Kingdom
Prior art keywords
mounting plate
support arm
mirror
region
breaking line
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.)
Granted
Application number
GB08318078A
Other versions
GB2123772B (en
GB8318078D0 (en
Inventor
Wolfgang Zipperle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB8318078D0 publication Critical patent/GB8318078D0/en
Publication of GB2123772A publication Critical patent/GB2123772A/en
Application granted granted Critical
Publication of GB2123772B publication Critical patent/GB2123772B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/04—Rear-view mirror arrangements mounted inside vehicle

Abstract

A mirror base for a vehicle internal rear view mirror has a support arm (1) projecting from a mounting plate (2) and a preset breaking line (8) which is in the region of the mounting plate (2). <IMAGE>

Description

SPECIFICATION Mirror base for an internal rear view mirror This invention relates to a mirror base for an internal rear view mirror for a motor vehicle, having a support arm projecting from a mounting plate and a preset breaking line.
In known mirror bases, the preset breaking line, provided for safety, is situated at the transition from the support arm to the mounting plate. This region of transition is so designed that the support arm breaks off the mounting plate when subjected to impact of a given magnitude.
Since the known mirrors tend to vibrate due to this weak point at the transition from the support arm to the mounting plate and the vibration may even result in breakage at this point, it is an object of this invention to provide a mirror base which, while satisfying safety requirements in the event of impact, is free from the disadvantages of the known mirror bases.
According to this invention there is provided a mirror base for a vehicle internal rear view mirror, having a support arm projecting from a mounting plate and a preset breaking line, the latter being situated in the region of the mounting plate.
Since the preset breaking line is situated in the region of the mounting plate, the support arm will also break off when an impact exceeds a given magnitude. Although the breakage occurs in the mounting plate itself rather than at the transition between the support arm and the mounting plate, this is no disadvantage. Placing the preset breaking line in the mounting plate itself eliminates or at least substantially reduces the tendency of the mirror to vibrate so that the possibility of breakage due to vibration is also eliminated.
The preset breaking line should preferably be provided in that region of the mounting plate on which the support arm is formed. This is particularly advantageous from a manufacturing point of view because the breaking line can then be obtained simply by sufficiently reducing the thickness of the mounting plate in that region. In the event of a breakage, the zone carrying the support arm becomes detached from the surrounding region of the mounting plate.
The invention will now be described in detail with reference to an embodiment given by way of example and illustrated in the drawing. The single figure represents a section through the exemplary embodiment of the mirror base according to the invention.
A mirror base for an internal rear view mirror for motor vehicles consists in known manner, as illustrated in the figure, of a support arm 1 and a mounting plate 2 at the end of which is formed the support arm 1. The support arm 1, which in this example consists of metal, is bent off at its free end portion forming a sphere 3 which engages in a spherical socket bearing of the mirror holder (not shown) and together with this bearing it enables the mirror to pivot in all directions relatively to the mirror base within given- limits.
The other end portion of the support arm 1 tapers towards the mounting plate 2 but only to such an extent that no breakage will occur at the transition from the support arm to the mounting plate when the mirror is subjected to the test load.
As shown in the figure, the mounting plate 2, which is substantially rectangular, has raised edge 4 which projects from the region 5 carrying the support arm 1 in the opposite direction to that of the support arm 1. This raised edge 4 extends only along three sides of the region 5 and forms a groove open to the inside. An attachment body (not shown) fits into the space bounded by the raised edge 4 and into the groove 6, and the mirror base is pushed over this body for assembly.
A securing screw 7 passing through the mounting plate 2 prevents accidental detachment of the mounting plate 2 from the attachment body.
As shown in the figure, the region 5 is so much reduced in wall thickness in the zone 8, which carries the support arm 1 but which is not limited to the area to which the end of the arm 1 is directly attached but extends beyond it laterally, that when an impact on the mirror exceeds the permissible limit, the zone 8 partly or completely breaks out of the region 5, whereby the support arm 1 is separated from the mounting plate 2.
Claims
1. Mirror base for a vehicle internal rear view mirror, having a support arm projecting from a mounting plate and a preset breaking line, the latter being situated in the region of the mounting plate.
2. Mirror base according to claim 1, wherein the preset breaking line is in that region of the mounting plate on which the support arm is formed.
3. Mirror base according to claim 2, wherein the preset breaking line is formed by a zone of reduced thickness of the mounting plate.
4. Mirror base for a vehicle internal rear view mirror, constructed and arranged substantially as herein described and shown in the drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Mirror base for an internal rear view mirror This invention relates to a mirror base for an internal rear view mirror for a motor vehicle, having a support arm projecting from a mounting plate and a preset breaking line. In known mirror bases, the preset breaking line, provided for safety, is situated at the transition from the support arm to the mounting plate. This region of transition is so designed that the support arm breaks off the mounting plate when subjected to impact of a given magnitude. Since the known mirrors tend to vibrate due to this weak point at the transition from the support arm to the mounting plate and the vibration may even result in breakage at this point, it is an object of this invention to provide a mirror base which, while satisfying safety requirements in the event of impact, is free from the disadvantages of the known mirror bases. According to this invention there is provided a mirror base for a vehicle internal rear view mirror, having a support arm projecting from a mounting plate and a preset breaking line, the latter being situated in the region of the mounting plate. Since the preset breaking line is situated in the region of the mounting plate, the support arm will also break off when an impact exceeds a given magnitude. Although the breakage occurs in the mounting plate itself rather than at the transition between the support arm and the mounting plate, this is no disadvantage. Placing the preset breaking line in the mounting plate itself eliminates or at least substantially reduces the tendency of the mirror to vibrate so that the possibility of breakage due to vibration is also eliminated. The preset breaking line should preferably be provided in that region of the mounting plate on which the support arm is formed. This is particularly advantageous from a manufacturing point of view because the breaking line can then be obtained simply by sufficiently reducing the thickness of the mounting plate in that region. In the event of a breakage, the zone carrying the support arm becomes detached from the surrounding region of the mounting plate. The invention will now be described in detail with reference to an embodiment given by way of example and illustrated in the drawing. The single figure represents a section through the exemplary embodiment of the mirror base according to the invention. A mirror base for an internal rear view mirror for motor vehicles consists in known manner, as illustrated in the figure, of a support arm 1 and a mounting plate 2 at the end of which is formed the support arm 1. The support arm 1, which in this example consists of metal, is bent off at its free end portion forming a sphere 3 which engages in a spherical socket bearing of the mirror holder (not shown) and together with this bearing it enables the mirror to pivot in all directions relatively to the mirror base within given- limits. The other end portion of the support arm 1 tapers towards the mounting plate 2 but only to such an extent that no breakage will occur at the transition from the support arm to the mounting plate when the mirror is subjected to the test load. As shown in the figure, the mounting plate 2, which is substantially rectangular, has raised edge 4 which projects from the region 5 carrying the support arm 1 in the opposite direction to that of the support arm 1. This raised edge 4 extends only along three sides of the region 5 and forms a groove open to the inside. An attachment body (not shown) fits into the space bounded by the raised edge 4 and into the groove 6, and the mirror base is pushed over this body for assembly. A securing screw 7 passing through the mounting plate 2 prevents accidental detachment of the mounting plate 2 from the attachment body. As shown in the figure, the region 5 is so much reduced in wall thickness in the zone 8, which carries the support arm 1 but which is not limited to the area to which the end of the arm 1 is directly attached but extends beyond it laterally, that when an impact on the mirror exceeds the permissible limit, the zone 8 partly or completely breaks out of the region 5, whereby the support arm 1 is separated from the mounting plate 2. Claims
1. Mirror base for a vehicle internal rear view mirror, having a support arm projecting from a mounting plate and a preset breaking line, the latter being situated in the region of the mounting plate.
2. Mirror base according to claim 1, wherein the preset breaking line is in that region of the mounting plate on which the support arm is formed.
3. Mirror base according to claim 2, wherein the preset breaking line is formed by a zone of reduced thickness of the mounting plate.
4. Mirror base for a vehicle internal rear view mirror, constructed and arranged substantially as herein described and shown in the drawing.
GB08318078A 1982-07-06 1983-07-04 Mirror base for an internal rear view mirror Expired GB2123772B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8219282 1982-07-06

Publications (3)

Publication Number Publication Date
GB8318078D0 GB8318078D0 (en) 1983-08-03
GB2123772A true GB2123772A (en) 1984-02-08
GB2123772B GB2123772B (en) 1986-02-05

Family

ID=6741610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08318078A Expired GB2123772B (en) 1982-07-06 1983-07-04 Mirror base for an internal rear view mirror

Country Status (1)

Country Link
GB (1) GB2123772B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1384816A (en) * 1971-04-01 1975-02-26 Cipa Comm Comptoir Inentions Driving mirrors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1384816A (en) * 1971-04-01 1975-02-26 Cipa Comm Comptoir Inentions Driving mirrors

Also Published As

Publication number Publication date
GB2123772B (en) 1986-02-05
GB8318078D0 (en) 1983-08-03

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee