JP3175469B2 - Mirror device for vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror device suitable for a large cab-over type vehicle such as a truck or a bus.

[0002]

2. Description of the Related Art At the front of a cab-over type large vehicle such as a truck, there is provided a mirror device in which several mirrors are combined in order to visually recognize the lower side and the rear side of the vehicle. For example, the driver's seat side of the right-hand drive vehicle (right side of the vehicle)
Is provided with a mirror for obtaining a rear view, and a mirror for backward confirmation, a mirror for downward confirmation or a mirror for downward confirmation on the side is provided on the passenger side (left side of the vehicle). Is attached to a fairly large stay.

[0003] Since the stay extends considerably outside the vehicle body, it may be necessary to retract the mirror device depending on the surrounding conditions during traveling or parking. In particular, the mirror device farther from the driver's seat (passenger seat side) is difficult for the driver himself to perform the storing operation by hand,
It is desired that the mirror device can be stored and the mirror can be extended (returned to the use position) by remote operation using a mechanical force of a motor or the like.

The electric mirror device for a large vehicle which has been developed in response to such a demand is generally provided with a mirror mounting stay so as to be reciprocally rotatable from a retracted position to an extended position, and this stay is provided with a speed reduction mechanism. The motor is provided with a turning mechanism, and the stay is stopped between the retracted position and the extended position by a stopper mechanism.

[0005] However, the large stay used in this type of mirror device has a long span, so that the stay itself is easy to shake. In some cases, the vibration generated by the vehicle or the vibration caused by the running of the vehicle is amplified and the vibration of the mirror is increased. For this reason, it is necessary to fix the stay so as not to cause slack, but it is inevitable that there is some degree of play in the gear backlash of the motor reduction mechanism and the joint part.

As means for preventing the stay from vibrating, FIG.
There has been proposed an electric mirror device 1 in which a stay 3 is pressed in a mirror extension direction by a gas spring 2 as shown in FIG. Stay 3 of this mirror device 1
Is provided with a stay body 3a for attaching a mirror, and a drive arm 3b connected to the stay body 3a by an intermediate joint 5. The drive arm 3b is turned by a motor unit 6 built in the vehicle body, so that the stay 3 rotates around a first rotating shaft (electric rotating shaft) 7. The drive arm 3b is pressed in the mirror extension direction by the gas spring 2.

The mirror device 1 can rotate the stay body 3a around the intermediate joint 5 with respect to the drive arm 3b, so that the position of the stay body 3a can be manually adjusted. That is, at the time of manual rotation, the stay main body 3a turns around the second rotation axis (manual rotation axis) 8. For this reason, the lower end of the stay body 3a is swingably and rotatably supported by the ball joint 9.

[0008]

In the mirror device 1 of the prior art, the gas spring 2 must be compressed when the drive arm 3b is turned in the storage direction by the motor unit 6, and the rotation of the drive arm 3b is required. Since the overhang from the center to the stay body 3a is large, the motor unit 6 must generate a considerably large torque. For this reason, there is a problem that the motor unit 6 is increased in size and cost is increased. Further, the gas spring 2 is a component that is larger and more expensive than ordinary springs and rubbers, and requires two types of rotating shafts (the electric rotating shaft 7 and the manual rotating shaft 8). The number of parts is large, such as the necessity of the ball joint 9, and there is room for improvement.

Accordingly, an object of the present invention is to provide a mirror device in which the electric rotating shaft and the manual rotating shaft can be shared by one shaft, and the vibration of the stay can be effectively suppressed with a simple configuration. It is in.

[0010]

SUMMARY OF THE INVENTION A mirror device according to the present invention, which has been developed to achieve the above object, comprises a housing fixed to the outside of a vehicle body and a rotatable tip of the housing.
And a base on the upper end side is rotatably supported by the housing by the swivel shaft, and an external force is applied to the housing.
And a lower end of the mirror mounting stay that can rotate relative to the pivot shaft when the mirror is mounted.
And lower support shaft which rotatably supports the, and forward and reverse rotatable motor accommodated in the housing, a rotary drive member driven by the provided and the motor inside said housing, said inside of said housing Pivot axis
A turning member that can rotate the mirror mounting stay from the mirror storage position to the mirror extension position with the rotation of the rotation axis , and a state in which the mirror installation stay is rotated to the mirror extension position. An elastic member provided at a position where the pivoting member is pressed against, and one end connected to the pivoting member and the other end connected to a position eccentric from the rotation center of the rotary driving member, rotational movement; and a link to tell the pivot member, upon manual rotation and electric rotary
In any case, a line connecting the pivot axis and the lower end support axis
Make sure that the mirror mounting stay rotates around
And features .

[0011]

The rotational force of the motor is transmitted to the rotation driving member, and the rotation of the rotation driving member causes the turning member to rotate through the link. Move the motor in the first direction (mirror storage direction)
In this case, since the turning member turns in the mirror storing position, the mirror mounting stay turns in the mirror storing direction.

The motor is moved in a second direction (mirror extension direction).
When the turning member is rotated in the opposite direction, the turning member turns in the mirror extending position, and the mirror mounting stay turns in the mirror extending direction, and the turning member is pressed against the elastic member in the mirror extending position. To stop in

When the base of the stay is held on the rotating shaft by the fastening means, when a torque of a certain magnitude or more is applied from the mirror mounting stay side, the stay is opposed to the frictional force of the fastening means. Can rotate relative to the pivot axis. For this reason, when it is desired to rotate the stay by hand, the stay may be gripped by hand and rotated around the turning axis. That is, one rotation axis functions as a manual rotation axis and an electric rotation axis.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 3 shows a mirror device 10 used for a cab-over type large vehicle such as a truck or a bus.
Is attached to the vehicle body 11. The mirror device 10 is provided on the passenger seat side and includes a mirror mounting stay 13 protruding forward of the windshield 12.

The mirror mounting stay 13 is bent in a U-shape.
, A rear-view mirror 16 and a side-down mirror 17 are mounted. The material of the stay 13 is preferably a metal tube in order to reduce the weight, but if weight does not matter, a solid metal rod may be used.

A base 20 on the upper end side of the stay 13 is attached to a turning shaft 22 of a motor unit 21. A lower end 25 of the stay 13 is rotatably supported by a bracket 27 by a lower end support shaft 26. The bracket 27 is fixed to a member (for example, a pillar 28) outside the vehicle body 11.

As shown in FIG.
Has a unit main body 31 having a housing 30 and legs 32, 33, 34 provided on the unit main body 31. The unit body 31 and the legs 32, 33, 34
They are fixed to each other by set screws 35, 36, 37. The legs 32, 33, 34 are fixed to a member 40 on the vehicle body side by fixing parts 41, 42, 43 such as bolts.

As shown in FIG. 4, the housing 30 comprises a housing body 50 located on the upper side in the figure and a housing cover 51 located on the lower side, and these are fixed to each other by screws 52. A sealing material 53 is provided on the entire joint surface between the housing body 50 and the housing cover 51, and the sealing material 53 prevents water from entering the inside of the housing 30.

For the housing body 50 and the housing cover 51, a molded product of a light alloy such as aluminum die cast is suitable, but in some cases, a synthetic resin such as a resin (FRP) reinforced with short fibers is integrally molded. Articles may be used. Reference numeral 54 in FIG.
7 shows a hole for inserting the same.

The actuator 6 is provided inside the housing 30.
0 is stored. The actuator 60 includes a DC motor 61 capable of rotating forward and reverse, and a reduction mechanism 62 for increasing the torque of the motor 61.
A drive gear 63 is attached to the output shaft of the motor. Motor 6
A cable 64 for supplying electric power to the vehicle 1 is connected to a power supply device inside the vehicle body via a wire harness (not shown) or the like.

The rotation driving member 70 is rotated by the motor 61. This rotation driving member 70
Rotates about a shaft 71. A driven gear 72 is provided on an outer peripheral portion of the rotation driving member 70.
Are engaged with the drive gear 63.

A turning shaft 22 is rotatably provided at the tip of the housing 30. The turning shaft 22 is provided with a fastening means 75 for holding the base 20 of the stay 13. The fastening means 75 is configured to restrain the stay base 20 with respect to the rotating shaft 22 by an appropriate frictional force, and is configured as shown in FIG.

That is, the fastening means 75 includes a flange-shaped stay mounting seat 76 provided at the upper end of the rotating shaft 22, a bolt portion 77 projecting upward from the stay mounting seat 76, and a U-shaped friction plate 78. And a nut 79 screwed into the bolt portion 77. The nut 79 is covered by a cap 80. A hole 81 provided in the stay base 20 is inserted into the bolt 77. The stay base 20 is formed in a flat shape, and the friction plate 78 is fitted so as to sandwich the stay base 20 from both upper and lower directions.

The friction plate 78 includes an upper plate 85 located above the stay base 20, a lower plate 86 located below the stay base 20, and a connecting portion 8 connecting the upper and lower plates 85, 86.
The lower plate 86 is fitted into a groove 88 provided in the stay base 20 so that the stay mounting seat 76 is formed.
Of the friction plate 78 is prevented.

The tightening means 75 having the above structure tightens the nut 79 with a predetermined torque to thereby allow the upper plate 8 of the friction plate 78 to rotate.
An appropriate frictional force is generated between the lower base plate 5 and the lower plate 86 and the stay base 20, and the stay base 20 can rotate integrally with the turning shaft 22 by the frictional force. In other words, when a certain degree or more of external force is input from the stay 13 side, the stay base 20 can rotate relative to the turning shaft 22 against the above-described frictional force.

The nut 79 fastens the stay base 20 via a friction plate 78, and the friction plate 78 is
0 by fitting into the groove 88 provided in the pivot shaft 2.
2 is held so as not to rotate relative to the rotating shaft 2, no force is generated to rotate the nut 79 even when the stay base portion 20 is relatively rotated with respect to the turning shaft 22 due to external force or the like, and the nut 79 is not rotated against vibration. And the friction plate 78 are kept integral. Therefore, by providing such a friction plate 78, an effect of preventing the nut 79 from loosening can be obtained.

The swivel shaft 22 inside the housing 30
Is provided with a turning member 90. This turning member 90
Is reciprocally rotatable from the mirror storage position shown in FIG. 1 to the mirror extension position shown in FIG.
When the turning member 90 is located at the mirror storage position, the amount of extension of the stay 13 with respect to the vehicle body decreases, and when the turning member 90 is located at the mirror extension position, the stay 13 returns to the normal mirror use position.

An elastic member 92 is fixed to the inner surface of the housing 30. The elastic member 92 is provided at a position where the revolving member 90 can receive the revolving member 90 when the revolving member 90 rotates to the mirror extension position. Elastic member 92
An example is a stopper rubber having rubber-like elasticity typified by synthetic rubber, urethane elastomer and the like. The elastic member 92 may be a metal spring such as a leaf spring, a coil spring, or a disc spring. In other words, the elastic member 92 may elastically support the turning member 90 when the turning member 90 turns to the mirror extension position. .

A link 95 is provided between the rotation driving member 70 and the turning member 90. One end 96 of the link 95 is connected to the turning member 90 by a shaft 97, and the other end 98 of the link 95 is connected to the rotation driving member 70 by a shaft 99 at a position eccentric from the rotation center of the rotation driving member 70. This link 95 is provided with a crank mechanism 100 for transmitting the rotational movement of the rotary drive member 70 to the turning member 90.
Is configured.

In the crank mechanism 100, the turning member 90 is located at the mirror extension position near the top dead center of the crank shown in FIG. The top dead center referred to in this specification is a position at which the distance from one end 96 of the link 95 to the rotary driving member 70 becomes maximum in the movement locus of the link 95 when the rotary driving member 70 rotates, that is, the axis 97. , 71 and 99 are aligned.

As the link 95 approaches the top dead center from the state shown in FIG. 1, the displacement of the one end 96 of the link 95 with respect to the angular velocity of the rotary drive member 70 gradually decreases. The pressing force, that is, the pressing force of the revolving member 90 against the elastic member 92 becomes substantially maximum.

Further, a stopper means 110 for stopping the turning member 90 between the mirror storage position and the mirror extension position is provided. Stopper means 1
One example of the motor 10 is a positioning mechanism 113 having an arc-shaped long hole 111 provided in the rotary driving member 70 and a pin 112 inserted into the long hole 111 as shown in FIG.
It comprises an electric circuit section or the like that cuts off the power supply to the motor 61 when the supply current of the power supply 1 exceeds a predetermined value.

The pin 112 is provided on the housing 30. When the rotation driving member 70 rotates to the mirror retracted position, as shown in FIG.
The rotation drive member 70 is stopped by abutting on one end wall 115 of the rotary member 11. As shown in FIG.
When 0 rotates to the mirror extension position, the pin 112 comes into contact with the other end wall 116 of the long hole 111 to stop the rotation driving member 70.

The electric circuit section of the stopper means 110 has an overcurrent detection circuit for detecting that the current supplied to the motor 61 has exceeded a predetermined value, and cuts off the power supply to the motor 61 when an overcurrent is detected. It consists of a current interrupt circuit, etc.
When the rotation driving member 70 is restrained by the positioning mechanism 113 in the mirror storage position and the mirror extension position described above, the current to the motor 61 is cut off by an overcurrent flowing through the motor 61. In addition, by using a limit switch instead of the overcurrent detection circuit, the power supply to the motor 61 may be cut off at the mirror storage position and the mirror extension position.

Next, the operation of the mirror device 10 will be described. When the motor 61 rotates, the rotation driving member 70 rotates due to the rotation of the driving gear 63.
The turning member 90 turns via the link 95. For example, when the motor 61 is rotated in the mirror extension direction from the mirror retracted state shown in FIG. 1, the drive gear 63 rotates in the direction of the arrow A1, and the rotation drive member 70 rotates in the direction of the arrow A2. Move in the direction of arrow A3. In this case, since the link 95 moves toward the top dead center of the crank, the turning member 90 rotates in the direction of arrow A4. Since the stay base 20 is restrained by the fastening means 75 on the turning shaft 22, the stay 13 rotates together with the turning of the turning shaft 22, so that the stay 13 can be rotated to the mirror extension position (FIG. 2). it can.

As described above, when the turning member 90 rotates in the mirror extending direction, as the link 95 approaches the top dead center of the crank, the pressing force of the link 95 increases. When the pin 112 of the stopper means 110 abuts against the end wall 116 of the elongated hole 111 near the top dead center, the turning member 90 stops, and the turning member 90
Abuts against the elastic member 92, and the turning member 90 is supported in a state where the elastic member 92 is bent to some extent. When this state is reached, the supply current to the motor 61 exceeds the specified value, so that the power to the motor 61 is cut off by the overcurrent detection circuit and the current cutoff circuit of the stopper means 110.

As described above, when the mirror 95 is in the extended position, the link 95 is in a stretched position, and the turning member 90 is pressed against the elastic member 92 in this manner.
The swing member 90 is restrained by a strong force, and the vibration of the stay 13 is prevented, for example, the vibration of the stay 13 is absorbed by the vibration absorption of rubber of the elastic member 92. In addition, by adding a spring (a tension spring, a torsion spring, or the like) for pressing the turning member 90 against the elastic member 92, the turning member 90 may be held at the mirror extension position with a stronger force.

Conversely, when the motor 61 is rotated in the mirror storing direction, the rotation driving member 70, the link 95, and the turning member 90 move in the direction opposite to the direction in which the mirror is extended, so that the stay 13 stores the mirror. Turning in the direction.
When the stay 13 has pivoted to the predetermined storage position, the pin 112 of the stopper means 110 abuts against the end wall 115 of the elongated hole 111, thereby stopping the rotation of the pivoting member 90 and turning off the power to the motor 61. Dripping.

When it is desired to rotate the stay 13 by hand as needed, the stay 13 is grasped by hand, and the stay 13 is rotated about the revolving shaft 22 against the frictional force of the fastening means 75. Good. When a torque is input from the stay 13 side, for example, when the mirror comes into contact with an obstacle, the stay 13 rotates about the turning shaft 22 as in the manual rotation.

The stay 13 rotates around a line connecting the turning shaft 22 and the lower end support shaft 26 in both the manual rotation and the electric rotation. Is made uniaxial. Therefore, it is not necessary to use a ball joint for the lower end support shaft 26.

[0041]

According to the present invention, with a simple configuration in which a combination of links and resilient members, stay can the keep securely fixed by the mirror overhanging position, with the vibration of the mirror can be suppressed, manual For mirror mounting
For rotating the stay and for attaching the mirror by motor
In both cases when rotating the stay,
A mirror mounting stay is centered on the line connecting the lower end support shaft.
Will rotate. That is, one rotating shaft can be used as an electric rotating shaft and a manual rotating shaft, so that the number of parts can be reduced and the structure can be simplified, and further, the stay can be prevented from vibrating without using a gas spring. This is extremely effective in reducing costs, such as the use of small devices.

[Brief description of the drawings]

FIG. 1 is a plan view of a stored state of a mirror device according to an embodiment of the present invention.

FIG. 2 is a plan view of the mirror device shown in FIG. 1 in an extended state.

FIG. 3 is an overall perspective view of the mirror device shown in FIG. 1;

FIG. 4 is a side view of a unit main body of the mirror device shown in FIG. 1;

FIG. 5 is a perspective view showing a conventional mirror device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Mirror device 13 ... Stay 15, 16, 17 ... Mirror 20 ... Base of stay 21 ... Motor unit 22 ... Revolving axis 30 ... Housing 61 ... Motor 70 ... Rotation drive member 75 ... Tightening means 76 ... Stay mounting seat 78 ... Friction plate 90 ... Revolving member 92 ... Elastic member 95 ... Link 100 ... Crank mechanism 110 ... Stopper means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-86656 (JP, A) JP-A-4-1046 (JP, U) JP-A-58-168941 (JP, U) JP-A-4-86 71338 (JP, U) JP 3-15758 (JP, U) JP 2 27944 (JP, U) JP 61-109853 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B60R 1/074 B60R 1/06

Claims (3)

(57) [Claims] A housing fixed to the outside of a vehicle body, a turning shaft rotatably provided at a distal end of the housing, and a base at an upper end side rotatably supported by the housing by the turning shaft, and an external force is reduced. When added to the above pivot axis
A mirror mounting stay rotatable with respect to the mirror mounting stay and a lower end of the mirror mounting stay rotatably supported;
A lower end support shaft, a forward / reverse rotatable motor housed in the housing, a rotation drive member provided inside the housing and driven by the motor, a rotation drive member provided in the housing inside the housing ,
A turning member capable of turning the mirror mounting stay from a mirror storage position to a mirror extension position with the rotation of the rotation shaft ; and a turning member in a state where the mirror mounting stay is turned to the mirror extension position. And a resilient member provided at a position where the rotary drive member is pressed against one another, one end of which is connected to the revolving member and the other end of which is connected to a position eccentric from the rotation center of the rotary drive member so that the rotational motion of the rotary drive member is ; and a link to tell the pivot member, and the pivot shaft either case during manual rotation during the electric rotary
The mirror mounting step is centered on the line connecting the lower end support shaft.
A mirror device for a vehicle, wherein a is rotated . 2. The base of the mirror mounting stay is mounted on a turning shaft rotatably provided on the housing, and the base of the mirror mounting stay is fastened so as to be relatively rotatable with respect to the turning shaft. 2. The vehicle mirror device according to claim 1, wherein the vehicle is mounted on the turning shaft in a state where a predetermined holding force is applied by a fastening means. 3. A stay mounting seat provided at an end of the turning shaft, a hole protruding from a surface of the stay mounting seat opposite to the turning shaft and formed in a base of the stay. A friction plate into which the bolt portion is inserted so as to sandwich the base of the stay, and which is fitted and fixed in a groove formed in the stay mounting seat; 3. A nut for fastening the base of the stay and the friction plate to each other.
A mirror device for a vehicle according to the above.