JP6366929B2 - Monitor support device - Google Patents

Description

  The present invention relates to a monitor support device, for example, a monitor support device for mounting a monitor on a vehicle interior ceiling.

Conventionally, many ball joints have been used as mirror support devices for supporting a rearview mirror in a vehicle compartment on a ceiling. As for the mirror support device, a method of fastening a housing holding a ball with a screw is generally used. According to this mirror support device, the mirror is firmly fixed at an arbitrary angle by the strength of screwing.
In this conventional mirror support device, since the weight of the mirror is light, the support angle of the mirror can be sufficiently held by the frictional force at the time of screwing.
On the other hand, in recent years, a driving support system has been proposed that includes a camera at the rear of a truck vehicle and a back monitor that projects a background image captured by the camera on the ceiling of the passenger compartment of the driver's seat (see Patent Document 1). .) The back monitor used in this system is heavier than the above-described rearview mirror.

JP 2004-352178 A

However, when this heavy back monitor is supported by the above-described support device for screwing the ball joint, there is a problem that precise torque management at the time of screw tightening is difficult and it is difficult to maintain the holding force at the time of product shipment. .
Further, when an excessive external force is applied to the heavy back monitor, there is a problem that the back monitor is not sufficiently protected.
Furthermore, there is a problem that vibration durability becomes poor when a heavy object such as a back monitor is suspended in the vehicle interior.
In the case where the housing holding the ball is tightened with a screw, the monitor or the like is firmly fixed by screwing. Therefore, when a strong external force acts on the monitor or the like, an excessive external force acts on the support device.

  Therefore, the object of the present invention is to eliminate the above-mentioned problems of the prior art, facilitate torque management, maintain the holding force at the time of product shipment, have excellent vibration durability, and protect against excessive external force. The object is to provide a monitor support device having a function.

In order to achieve the above object, the present invention includes a support arm attached to a fixed portion, and a support tool coupled to the support arm via a ball joint mechanism and supporting a monitor device, The mechanism includes a torque limiter mechanism, and the ball joint mechanism includes a sphere provided at a tip of the support arm, a fixed plate having a holder for holding the sphere, and a movable plate, and the fixed plate is provided at a base portion. A fixed boss for connecting the monitor device; and a spring support boss for supporting a spring between the fixed boss and the holder; and the movable plate includes a spring receiving portion for supporting the spring at a base, and the torque limiter. mechanism, the arranged spring support boss and said spring receiving portion, the fixed spring receiving portion of the movable plate Via the sleeve between the rate of the spring support bosses, said biasing the movable plate toward the fixed plate, and a coil spring to obtain the clamping force of the sphere of the ball joint mechanism, that Features. In this case, a sphere of the ball joint mechanism may be provided at the tip of the support arm.

In the present invention, the spring force of the coil spring becomes the tightening force of the sphere of the ball joint mechanism. Therefore, by managing the spring force of the coil spring, the tightening force of the sphere can be managed, and torque management is easy. Maintains the holding force at the time of product shipment.
In addition, since the spring force of the coil spring becomes the tightening force of the ball joint mechanism sphere, when the monitor device is suspended from, for example, a ceiling in a vehicle interior, vibration durability due to vehicle vibration or the like can be improved. it can.

The movable plate may be urged by the coil spring and pressed in parallel.
The monitor device may be slidably attached to the support and may include a load adjustment mechanism that adjusts a spring force of the coil spring according to a slide position .

  According to the present invention, torque management is easy, holding force at the time of product shipment can be maintained, and vibration durability can be improved when a heavy object such as a monitor is suspended in the vehicle interior.

A is a front view of the monitor support device according to the present embodiment, B is a side view thereof, and C is a rear view thereof. It is sectional drawing equivalent to FIG. 1B. It is a principal part enlarged view of a ball joint mechanism. It is a disassembled perspective view which shows the support arm which concerns on this Embodiment, a ball joint mechanism, and a support tool. A is a figure which shows the state by which the monitor apparatus was suspended in the vehicle interior, and B is a figure which shows the state in which the monitor apparatus rotated integrally with the support tool. A is a figure which shows the state by which the monitor apparatus was suspended in the vehicle interior, and B is a figure which shows the state in which the monitor apparatus rotated integrally with the support tool. It is a figure which shows the state which fixed the monitor apparatus to the lower part of a support tool. It is a figure which shows the state which fixed the monitor apparatus to the upper part of a support tool.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1A is a front view of a monitor support device according to the present embodiment, FIG. 1B is a side view thereof, and FIG. 1C is a rear view thereof.
In FIG. 1, the code | symbol 1 shows the ceiling (fixed part) in a vehicle interior. A support arm 2 is attached to the ceiling 1. A support 3 is connected to the support arm 2. A monitor device 4 is connected to the support 3.

FIG. 2 is a cross-sectional view corresponding to FIG. 1B.
A support 3 is connected to the support arm 2 via a ball joint mechanism 10. The ball joint mechanism 10 includes a sphere 5 provided at the tip of the support arm 2, and a fixed plate 7 and a movable plate 8 that sandwich the sphere 5.
A holder 12 having a concave surface 11 along the outer surface of the sphere 5 is fixed to the tip of the fixed plate 7, and a holder 14 having a concave surface 13 along the outer surface of the sphere 5 is fixed to the tip of the movable plate 8.

FIG. 3 is an enlarged view of a main part of the ball joint mechanism 10.
The fixed plate 7 has a fixed boss 15 at the base, and a spring support boss 16 is provided between the fixed boss 15 and the holder 12. The spring support boss 16 extends in a cylindrical shape, and an internal thread 26 is formed on the inner periphery of the spring support boss 16.
A sleeve 27 is assigned to the spring support boss 16, and the sleeve 27 is fixed to the spring support boss 16 by screwing a screw 28 into the female screw 26 of the spring support boss 16. A male screw 17 is formed on the outer periphery of the tip of the sleeve 27.
The movable plate 8 has a spring receiving portion 20 at the base, and a support boss 21 is provided between the spring receiving portion 20 and the holder 14.

  The spring receiving portion 20 is provided with a through hole 22 into which the spring support boss 16 is fitted. The spring support boss 16 of the fixed plate 7 passes through the through hole 22 of the movable plate 8. A sleeve 27 is connected to the spring support boss 16, and a spring receiving nut 23 is screwed to the male screw 17 of the sleeve 27. A coil spring 25 is held in a compressed state between the spring receiving nut 23 and the spring receiving portion 20.

As shown in FIG. 1C, a guide rail 41 is disposed on the back surface of the monitor device 4, and a slider 42 is fitted to the guide rail 41 as shown in FIG. The slider 42 has a portion 43 protruding from the guide rail 41, and this portion 43 is fitted to the inner periphery of the fixed boss 15 of the fixed plate 7.
The fixing plate 7 is integrated with the slider 42 by screwing a screw 44 into a female screw 45 provided on the inner periphery of the slider 42. The monitor device 4 and the fixed plate 7 are integrated by sandwiching the wall portion 47 of the guide rail 41 between the portion 46 of the slider 42 and the fixed boss 15 and tightening the screw 44.

  In this embodiment, a fixed plate 7 attached to the monitor device 4, a movable plate 8 that holds the sphere 5 in cooperation with the fixed plate 7, and is interposed between the movable plate 8 and the fixed plate 7, The coil spring 25 that urges the movable plate 8 toward the fixed plate 7 constitutes a torque limiter mechanism 100.

  FIG. 4 is an exploded perspective view showing the support arm 2, the ball joint mechanism 10, and the support 3. Two holders 12 and 14 sandwiching the sphere 5 are assigned to both ends of the sphere 5 in total, two in total. The holders 12 and 14 applied to both ends have the same structure. These have concave surfaces 11 and 13 that are curved along the sphere 5 so as to be in close contact with the sphere 5. In addition, two cylindrical protrusions 11b or 13b are provided on the side surface opposite to the side surface in close contact with the sphere 5. The fixing plate 7 is formed with a cylindrical hole 7a having a size to fit the protrusion 11b of the holder 12, and the hole 7a and the protrusion 11b are combined. The movable plate 8 is formed with a cylindrical hole 8a having a size to fit the protrusion 13b of the holder 14, and the hole 8a and the protrusion 13b are combined.

  In this configuration, the torque limiter mechanism 100 includes the cover body 105 and the cover lid 106. The cover body 105 and the cover lid 106 are coupled by four screws 107. The cover body 105 and the movable plate 8 are coupled by a washer-attached screw 108.

In the present embodiment, the driver of the truck vehicle grasps and rotates the lower end of the monitor device 4 so that the movable plate 8 and the fixed plate 7 are integrated by the spring force of the coil spring 25 in FIG. As it is, it slips around the sphere 5 and rotates in the direction of the force. Thereby, the support angle of the monitor apparatus 4 can be easily adjusted to a user's desired angle.
At this time, in this configuration, since the spring force of the coil spring 25 becomes the tightening force of the sphere 5 of the ball joint mechanism 10, the monitor device 4 is supported at an arbitrary angle with respect to the ceiling 1 by this tightening force. be able to. Therefore, by managing the spring force of the coil spring 25, when the heavy monitor device 4 is suspended from the ceiling 1 in the vehicle interior, for example, the tightening force of the sphere 5 is reduced compared to conventional screwing. It can be managed easily.
In addition, since the spring force of the coil spring 25 can be managed by the tightening amount of the spring receiving nut 23 screwed into the sleeve 27, torque management is easy and the screw is not tightened as in the conventional case. The holding power can be easily maintained.
Since the spring force of the coil spring 25 becomes the tightening force of the sphere 5 of the ball joint mechanism 10, when this monitor device 4 is suspended from the ceiling 1 in the passenger compartment, for example, the vibration durability due to the vibration of the vehicle is improved. it can.

  The movable plate 8 is configured to be biased by the coil spring 25 and press-contacted substantially parallel to the fixed plate 7. Therefore, the spherical body 5 can be always held in parallel by the fixed plate 7 and the movable plate 8, and the holding force is stabilized.

The operation of the present embodiment will be described with reference to FIGS.
FIG. 5A shows a state in which the monitor device 4 is suspended from, for example, the ceiling 1 in the passenger compartment.
In this configuration, as shown in FIG. 3, a coil spring 25 is interposed between the movable plate 8 and the fixed plate 7, and the coil spring 25 biases the movable plate 8 toward the fixed plate 7. The sphere 5 is sandwiched. Therefore, the spring force of the coil spring 25 is the tightening force (friction force) of the sphere 5 of the ball joint mechanism 10.
The tightening force of the coil spring 25 is appropriately set by tightening or loosening the spring receiving nut 23 at the time of factory shipment.
When an external load is applied to the lower portion of the monitor device 4 in the direction indicated by the arrow in FIG. 5A, the movable plate 8 and the fixed plate 7 remain integrated with the spring force of the coil spring 25 in FIG. , Slips around the sphere 5 and rotates in the direction of force application.
That is, as shown in FIG. 5B, the monitor device 4 rotates in the direction of the arrow integrally with the support 3 with the sphere 5 as the center of rotation.

FIG. 6A shows a state in which the monitor device 4 is suspended from, for example, the ceiling 1 in the passenger compartment. Even when an external load is applied to the side of the monitor device 4 in the direction of the arrow, as described above, the movable plate 8 and the fixed plate 7 in FIG. While being integrated by force, it slips around the sphere 5 and rotates in the direction of force application.
That is, as shown in FIG. 6B, the monitor device 4 rotates in the direction of the arrow integrally with the support 3 with the sphere 5 as the rotation center.
In this embodiment, even if an excessive external load is applied to the monitor device 4, the torque limiter mechanism 100 operates, so that no excessive force is applied to the support 3 of the monitor device 4. 3 and the ceiling 1 in the passenger compartment can be protected.

FIG. 7 shows a state in which the monitor device 4 is slid and fixed to the lower part of the support 3, and FIG. 8 shows a state in which the monitor device 4 is slid and fixed to the upper part of the support 3.
When shifting from the state of FIG. 2 to the state of FIG. 7, referring to FIG. 2, the screw 44 is once loosened, and the monitor device 4 is moved along the guide rail 41 to the lower part of the support 3 together with the slider 42. Slide and tighten the screw 44 at that position. Similarly, when shifting from the state of FIG. 2 to the state of FIG. 8, referring to FIG. 2, the screw 44 is once loosened, and the monitor device 4 is moved along the guide rail 41 together with the slider 42 to support the support 3. Then, the screw 44 is tightened and fixed at that position.

In the state of FIG. 7, the movable plate 8 and the fixed plate 7 are integrated by the spring force of the coil spring 25 in FIG. The sphere 5 is slipped around and rotated in the direction of the force.
In this case, it is desirable to tighten the spring receiving nut 23 provided on the sleeve 27 to contract the coil spring 25 and strengthen the spring force.
On the contrary, in the state of FIG. 8, the monitor device 4 does not rotate with the support 3 unless a large external load is applied with a moment as compared with the state of FIG. 7. In this case, it is desirable to loosen the spring receiving nut 23 provided on the sleeve 27 and extend the coil spring 25 to weaken the spring force.

In the present embodiment, the monitor device 4 is slidably attached to the support 3 by the guide rail 41 and the slider 42 as described above. The spring receiving nut 23 provided on the sleeve 27 constitutes a load adjusting mechanism that adjusts the spring force of the coil spring 25 according to the slide position of the monitor device 4.
As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this, A various change aspect is possible.
For example, in the above embodiment, the monitor device 4 is suspended from the ceiling 1, but the present invention can be applied to all cases where the monitor device 4 is supported by any fixed part other than the passenger compartment.

1 Car interior ceiling (fixed part)
DESCRIPTION OF SYMBOLS 2 Support arm 3 Support tool 4 Monitor apparatus 5 Sphere 7 Fixed plate 8 Movable plate 10 Ball joint mechanism 25 Coil spring 41 Guide rail 100 Torque limiter mechanism

Claims (2)

A support arm attached to the fixed part; and a support member connected to the support arm via a ball joint mechanism and supporting a monitor device; the ball joint mechanism including a torque limiter mechanism;
The ball joint mechanism includes a sphere provided at a tip of the support arm, and a fixed plate and a movable plate having a holder for holding the sphere.
The fixed plate includes a fixed boss that connects the monitor device to a base, and a spring support boss that supports a spring between the fixed boss and the holder,
The movable plate includes a spring receiving portion that supports a spring at a base portion,
The torque limiter mechanism is disposed on the spring support boss and the spring receiving portion, and a sleeve is interposed between the spring support portion of the movable plate and the spring support boss of the fixed plate, and the movable plate is attached to the fixed plate. It is composed of a coil spring for urging the ball joint mechanism to obtain a tightening force of the sphere ,
A monitor support device characterized by that.   The monitor support device according to claim 1, wherein the monitor device is slidably attached to the support and includes a load adjustment mechanism that adjusts a spring force of the coil spring according to a slide position.

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