JPH0755379Y2 - Angle adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an angle adjusting mechanism for holding a member rotatably attached to a device body at several desired angles.

[Prior Art] At present, various things around us have been miniaturized,
One of the methods is to change the stationary type into a folding type. As a result, the limited space can be effectively used, and it becomes possible to store and even carry some items.

For example, on-vehicle liquid crystal televisions, word processors, personal computers, operation panels of various devices, and the like, which are miniaturized by making them foldable, can be seen. These are used by opening or folding the folded portion, but at this time, it is necessary to make the operation panel or the like at an angle which is easy to use or easy to see with respect to the device body.
For this reason, an angle adjusting device is used in a mounting portion between the device body, which is a fixed portion of these devices, and the operation panel in which it is necessary to change the angle.

By the way, as an angle adjusting device like this, the ninth
The ones shown in Figures and 10 are known. That is, in this conventional technique, the fixing member 21 provided on the side surface of the device body,
A rotary plate 22 provided on the side surface of the operation panel is rotatably connected about a shaft 23. Then, either one of the fixed member 21 and the rotating plate 22 (in the example of the drawing, the rotating plate
22) is provided with a recess 24, and a spring is provided inside the recess 24.
A bearing 26 is fitted in the vicinity of the surface 25 and contacts the spring 25. The bearing 26 engages with a plurality of angle adjusting mechanisms 27 on the other side (the fixing member 21 in the example in the figure) which are radially formed from the center at predetermined intervals. At this time, the bearing 26 is pressed by the spring 25 from the rear surface thereof, so that the bearing 26 is firmly engaged with the angle adjusting groove 27, and the angle between the fixed member 21 and the rotating plate 22, that is, these, is fixed by this engaging force. Hold the attached device and operation panel at a fixed angle.

Further, in order to adjust and change the angle, the turning plate 22 is turned by applying a hand force to the operation panel or the like.
Since the force applied to 22 overcomes the force of the spring 25 pressing the bearing 26 and the bearing 26 is disengaged from the initial angle adjustment groove 27, the operation panel or the like is rotated until the desired angle is obtained.
The bearing 26 is engaged with the angle adjusting groove 27 at that position.
In this manner, the angle is adjusted by sequentially engaging the bearing 26 with the desired angle adjustment groove 27.

[Problems to be Solved by the Invention] However, in the conventionally used device, the load of the operation panel or the like provided with the rotating plate 22 is related to the bearing 26 and the angle adjusting groove 27 at a predetermined position from the shaft 23. Since it is supported by the resultant force, if the distance between the shaft 23 and the engaging portion of the bearing 26 becomes too small, the moment acting as the supporting force at the engaging portion becomes small, and the load of the operation panel or the like cannot be supported. Therefore, in this conventional type, it is difficult to keep the distance between the shaft 23 and the engaging portion to be a certain value or less with respect to the load, and it is difficult to miniaturize the angle adjusting device and the device body in which the angle adjusting device is installed.

Further, in the conventional device, the spring 25 force for supporting the bearing 26 is orthogonal to the direction for adjusting the angle, that is, acts in the moving direction of the rotating plate 22 from the side, so the spring 25 for pressing the bearing 26. Only part of the force will be used to support the swivel plate, and the spring 25 supporting the bearing 26 must be strong. However, the rotating plate 22 (or the fixing member 21) having the recess 24 sandwiching the spring 25 and the bearing 26 is provided.
Requires a thickness for the recess 24, so the larger the spring 25, the greater the thickness.

As described above, if the angle adjusting device used conventionally is downsized as it is, the operation panel or the like cannot be stably held at a desired angle.

An object of the present invention is that the size and thickness are smaller than those of the prior art and does not occupy a lot of space, and moreover, a rotating member such as an operation panel can be stably held at a desired angle. It is to provide an angle adjusting mechanism.

Another object of the present invention is to provide an angle adjusting mechanism in the above-mentioned device, which can adjust the angle with a constant force regardless of the angle at which the operation panel or the like is held.

[Means for Solving the Problem] The invention according to claim 1 is characterized in that an engaging projection is formed on the rotating member,
Furthermore, a plurality of engaging grooves that are sequentially engaged with the engaging protrusions by the rotation of the rotating member are formed in the lock arm that is pivotally supported by the rotating shaft of the fixing member and is biased by the springs toward the engaging protrusions. It is characterized by that.

Further, according to the invention of claim 2, a plurality of engagement grooves formed in the lock arm are sequentially formed at stepwise different distances with respect to the rotation shaft, and the engagement grooves are located at positions distant from the rotation shaft. It is characterized in that the depth of the groove is set to be larger than that of the engaging groove at a position close thereto.

[Operation] The operation of the present invention having the above configuration is as follows.

That is, according to the angle adjusting mechanism of the first aspect of the present invention,
When the rotating member is rotated, the engaging protrusion of the rotating member moves along the side edge of the lock arm, but the lock arm is biased by the spring by the engaging protrusion.
The engagement protrusion engages with the engagement groove formed in the lock arm. In order to make the rotating member have a desired angle, the engaging protrusion is engaged with the engaging groove having the angle to hold the rotating member.

Further, when a plurality of engagement grooves formed in the lock arm are sequentially formed at different distances stepwise with respect to the rotating shaft,
When the engaging protrusions of the rotating member engage with the engaging grooves, the moment varies depending on the distance from the rotating shaft to the engaging grooves,
As the engaging groove is farther from the rotating shaft, the rotating member rotates with a lighter force. On the other hand, in the angle adjusting mechanism according to the second aspect, in addition to this structure, by making the engaging groove farther from the rotation shaft deeper, regardless of the angle to be adjusted,
The rotating member can be rotated with a constant force.

[Embodiment] The details of the present invention will be explained based on the illustrated embodiment. It should be noted that the present embodiment includes the inventions of both claim 1 and claim 2. Further, in this embodiment, an angle adjusting mechanism provided in a vehicle-mounted liquid crystal television will be described.

1 to 8 show an embodiment of the angle adjusting mechanism according to the present invention. In the drawings, 1 is a slide unit part,
Reference numeral 2 denotes a storage case for the slide unit portion 1. The slide unit portion 1 comprises a front rotating member 3a and a rear fixing member 5, and the rotating member 3a relative to the fixing member 5 is provided.
An angle adjustment mechanism section 4 is provided for adjusting the operation angle of. In this embodiment, a liquid crystal television is provided on the rotating member 3a, and the angle adjusting mechanism section 4 holds the liquid crystal television at an angle that is easy to see.

Then, the slide unit 1 provided with the rotating member 3a is
The rotating member 3a is vertical to the fixed member 5 (inclination 0 °)
2 is slidable between the storage position in the storage case 2 as shown in FIG. 1 and the withdrawal position as shown in FIG. 2, and the angle is adjusted at the withdrawal position shown in FIG. The liquid crystal television of the rotating member 3a can be held at a desired angle that is easy to use by being bent from the shaft 6 of the mechanism unit 4. Third
The figure shows such a bent state.

The angle adjusting mechanism portion 4 includes a lock arm 7 and a spring 8 arranged between the fixed member 5 of the slide unit portion 1 and the side surface of the rotating member 3a, and a shaft-like member provided on the side surface of the rotating member 3a. The engaging projection 9 of FIG.

The lock arm 7 is a rotary shaft provided on the fixed member 5.
The shaft 11 is pivotally supported on the rotating member 3a, and the concave side facing the engaging protrusion 9 provided on the rotating member 3a has four types of engaging grooves.
10a-10d are formed. The engaging grooves 10a to 10d have bending angles of the rotating member 3a of 0 °, 20 °, 40, for example.
It is formed so that it becomes 60 °. Also, this engaging groove 1
In 0a to 10d, the larger the distance (1) from the rotating shaft 11 (1 ₁ > 1 ₂ > 1 ₃ > 1 ₄ ) is, the deeper the engaging groove 10 is (10).
a>10b>10c> 10d). Also, the lock arm 7
A control hole 12 is formed on the convex curved side of. This control hole
The reference numeral 12 is fitted to the control shaft 13 fixed to the fixing member 5, and is formed on the circumference of a circle centered on the rotation shaft 11 and having the radius (r) as the center point of each of the control shaft 13 and the rotation shaft 11. It is formed by cutting out the moving range of the control shaft 13 along the same.

By the way, the spring 8 is composed of a spiral portion 8a and two rod-shaped ends 8b extending from the spiral portion 8a. The spiral portion 8a has a rotating shaft 11 passed through the center thereof, and is further sandwiched between a lock arm 7 and a fixing member 5. There is. Further, one of the two rod-shaped ends 8b is hooked on the locking portion 7a provided at the lower end of the lock arm 7, and the other one is hooked on the fixing member 5.

The operation of this embodiment having the above configuration is as follows.

First, when the rotating member 3a is used, as shown in FIGS. 1 to 3, the slide unit portion 1 provided with the rotating member 3a housed in the storage case 2 is completely pulled out forward. Next, adjust the bending angle downward so that it is easy to see. At this time, the angle is adjusted by the angle adjusting mechanism section 4 of the present embodiment.

That is, as shown in FIG. 4, the rotating member 3a is bent downward (direction E) about the shaft 6 connected to the fixed member 5.
At this time, the engaging shaft 9 attached to the rotating member 3a moves along the concave curved piece of the lock arm 7. By the four kinds of engaging grooves 10a to 10d provided on the concave side, the bending angle of the rotating member 3a is 0 °, 2 ° as an example.
It is held at 0 °, 40 ° and 60 °.

By the way, in order for the engagement groove 9 to engage with each engagement groove 10 of the lock arm 7, it is necessary to climb over the convex portion between each engagement groove 10. When the lock arm 7 is in the fixed state, the engagement shaft 9 that rotates about the shaft 6 cannot climb over the convex portion, so that the lock arm 7 rotates about the rotation shaft 11. The engagement shaft 9 is movable. That is, the spring 8 is provided between the lock arm 7 and the fixed member 5.
The lock arm 7 is urged toward the engagement shaft 9 by the force of the spring 8. Therefore, as shown in FIG. 4, the lock arm 7 in the initial state (horizontal state) in which the engaging shaft 9 engages with the engaging groove 10a and has an inclination of 0 ° is moved forward by the force of the spring 8. It receives a force in the direction (A direction). When the rotating member 3a is pushed in the E direction in this state, the lock arm 7 receives a force that opposes the force in the A direction, as shown in FIG. (B direction)
Perform a turning motion to. At this time, at the locking portion 7a, the spring 8
Force is in the tangential direction of rotation (A 'direction). This spring 8
The force received by the lock arm 7 is larger than that in the horizontal state. When the rotating member 3a is further pressed in the E direction, the engaging shaft 9 engages with the engaging groove 10b and is inclined by 20 ° as shown in FIG. At this time, the lock arm 7 has returned to the original position, and the force of the spring 8 is in the same A direction as in the horizontal state. Then, the force received by the lock arm 7 becomes the same as that in the horizontal state. In this way, the angle adjustment at this angle is completed. At other angles, the angles are adjusted similarly.

On the other hand, the control hole 12 formed in the lock arm 7 fits with the control shaft 13 fixed to the fixing member 5, and the lock arm 7 does not rotate more than the required amount of the engaging operation as described above. Are regulated.

By the way, in this embodiment, the engaging groove 10a of the lock arm 7 is
As for 10d, the convex portion between the engagement groove and the engagement groove becomes lower as the rotation shaft 11 gets closer. This can be considered from the magnitude of the force of the spring 8 in the A direction and the force in the B direction against it. That is, since the spring 8 is always biased at the locking portion 7a of the lock arm 7, the force for rotating the lock arm 7 in the A direction is constant. On the other hand, the engaging shaft 9 moves along the side edge of the lock arm 7 as the rotating member 3a rotates, that is, contacts at different positions.
Therefore, the magnitude of the force that tries to rotate in the B direction against the force of the spring 8 at the positions of the engagement grooves 10a to 10d differs depending on the difference in the distance moment from the rotation shaft 11. The magnitude of the force in the B direction is maximum in the engagement groove 10a having the largest distance moment and minimum in the engagement groove 10d having the smallest distance moment. Therefore, in the engaging groove 10a having a large distance moment as in this embodiment, the groove is deep and the engaging groove 1 is small.
In 0d, by forming a convex portion between the engaging grooves so as to make the groove shallow, the magnitude of the force for rotating in the B direction can be made constant.

As described above, according to the angle adjusting mechanism of the present embodiment, the load of the rotating member can be reduced by engaging the engaging groove formed in the lock arm with the engaging shaft fixed to the rotating member. It can be sufficiently supported, and the rotating member can be stably held at a desired angle.

Further, since the position of the spring is between the lock arm and the fixing member, and the thickness of the spring does not change even if the spring is made stronger, the thickness for the spring can be remarkably smaller than that of the prior art. As a result, even if the distance from the rotating shaft to the engagement groove is short, by using a large spring with a strong force,
Even if the rotating member is heavy, the thickness can be sufficiently held without changing the thickness. Further, since the shape of the lock arm is not the disk shape but the arm shape, the distance from the rotating shaft to the engagement groove can be made larger than that of the disk shape, and thus the size can be reduced as compared with the conventional technology. . That is, regardless of the size of the slide unit, the same effect can be obtained even in a small device.

Furthermore, in this embodiment, by changing the depth of the engaging groove, the angle can be adjusted with a constant force regardless of the angle at which the rotating member is held.

It should be noted that the present invention is not limited to the above-described embodiment, and the specific shape of each member or the mounting position and method of each member can be appropriately changed.

For example, when only claim 1 is applied, the following changes can be made by utilizing the correlation between the distance from the rotation axis of the engagement groove and the depth. That is, when the frequently used angle is 40 ° in the above-described embodiment, the engagement groove 10c is deep, that is, by increasing the convex portion between the engagement groove 10d, a constant up to 40 °. Since it moves by the operation operation and needs more force to reach 60 °, it can be stopped easily at 40 °.

Further, the angle adjusting mechanism of the present invention is not limited to an in-vehicle liquid crystal television, and can be used for various angles such as a portable word processor, personal computer, operation panel of various devices, lids and doors, etc. It can be used for equipment that requires adjustment. Further, by changing the strength of the spring, the depth of the engaging groove, etc., the engagement can be adjusted to suit the type and size of the device, and an angle adjusting mechanism with a wide range of use can be obtained.

[Advantage of the Invention] According to the angle adjusting mechanism of the first aspect of the present invention, both the size and the thickness are smaller than those of the prior art, and the space is saved, and the operation panel or the like can be rotated. The member can be stably held at a desired angle.

Further, according to the angle adjusting mechanism of the second aspect, the angle can be adjusted with a constant force regardless of the angle at which the operation panel or the like is held.

[Brief description of drawings]

FIG. 1 is a front perspective view showing an unused state of a main embodiment of the present invention, FIGS. 2 and 3 are front perspective views showing a used state of the same embodiment, and FIG. 4 is a main part of the same embodiment. FIG. 5 is a side perspective view, FIG. 5 is a front exploded view of the main part of the same embodiment, FIG. 6 is a side view of the main part of the same embodiment, FIG. 7 is a side view of the main part of the same embodiment, and FIG. Similarly, FIG. 9 is an exploded perspective view of a conventional angle adjusting mechanism, and FIG.
The figure is also a side sectional view of a conventional angle adjusting mechanism. 1 …… Slide unit part, 2 …… Storage case, 3a ……
Rotating member, 4 ... Angle adjusting mechanism part, 5 ... Fixing member, 6
...... Axis, 7 ...... Lock arm, 7a ...... Locking part, 8 ...... Spring, 8a ...... Swirl part, 8b ...... Bar end, 9 ...... Engagement shaft, 10 ...
… Engagement groove, 10a… Engage with storage case at 0 °, 10b… Engage with storage case at 20 °, 10c… Engage with storage case at 40 °, 10d… Engage with storage case at 60 ° Engagement, 11 ... Rotating axis, 1
2 …… Control hole, 13 …… Control axis. 21 …… Fixing member, 22 ……
Rotating plate, 23 ... Shaft, 24 ... Recess, 25 ... Spring, 26 ... Bearing, 27 ... Angle adjustment groove.

Claims (2)

[Scope of utility model registration request] 1. An angle adjusting mechanism for holding a rotating member rotatably attached to a fixing member at a desired angle, wherein an engaging projection provided on the rotating member and a fixing member provided on the fixing member. A lock arm that is axially supported by the rotating shaft, is urged by the spring to the engagement protrusion, and has a plurality of engagement grooves formed on a side facing the engagement protrusion; An angle adjusting mechanism, comprising: a plurality of engaging grooves in which engaging protrusions are sequentially engaged with the rotation of the rotating member. 2. A plurality of engagement grooves formed in the lock arm are sequentially formed at stepwise different distances with respect to the rotating shaft, and the depth of the engaging groove at a position distant from the rotating shaft is set. 2. The angle adjusting mechanism according to claim 1, wherein the engaging groove is set to be larger than the engaging groove at a position closer to the engaging groove.