JPS63257813A - Height adjusting device provided with inclined angle adjusting function - Google Patents

Abstract

PURPOSE:To steplessly adjust the inclined angle and height of a position to be set by generating frictional force corresponding to rotational moment based upon the load of a moving element depressed by a spring and an arm rotated by a cam and rotating a receiving member in accordance with the rotation of the arm. CONSTITUTION:When a mounting board 13 mounting a word processor or the like is manually lifted, the arm 1 pivoted around a shaft 2 is rotated, frictional force based on the spring 7 of the moving element 5 fitted to the arm 1 so as to be optionally moved in its radius direction and the cam 6 is changed in accordance with the change of rotational moment due to the load of the arm 1, the arm 1 is stopped in a balanced state, and the height of the receiving member 9 is steplessly adjusted. On the other hand, the rotation of the shaft 2 is transmitted to a shaft 10 through a belt 22 and the member 9 is turned to a horizontal state. Since a braking means 16 is stopped by frictional force generated between the means 16 and a movable shaft 11 through a spring 18, the inclined angle of the member 9 can be also steplessly adjusted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a tilt angle that makes it possible to maintain a display of office equipment such as a word processor or a personal computer, or a monitor television in a state that is easy for a viewer to view or monitor. The present invention relates to a height adjustment device having an adjustment function.

[Conventional technology and its problems]

For office equipment displays or monitor televisions, it is necessary to set the screen at the height that is most easily viewed by the operator, and for this reason, the height of the table on which these items are placed is adjustable. Or, it may be possible to adjust the tilt angle to adjust the elevation angle with respect to the screen.

However, in the conventional mounting table, either the height adjustment or the inclination adjustment is possible, and it is not possible to adjust the :A adjustment of both. Further, these adjustments were made in stages using ratchets, hooks, etc., making it more difficult to accurately obtain the optimal height or inclination for the viewer.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide an inclination adjustment that allows the inclination adjustment and height adjustment of an object to be placed to be carried out in a stepless manner with a single device. The purpose of the present invention is to provide a height adjustment device with functions.

[Means for solving problems]

The present invention consists of the following two inventions to achieve the above object.

A first aspect of the invention includes an arm that is pivoted at one end and rotates at the other end, a mover attached to the arm so as to be movable in the radial direction of the rotation, and a mover fixed near the pivot point of the arm. A cam having a cam surface on which the slider slides, a spring attached to the arm and urging the slider to press against the cam surface, and a support for a member to be lifted and lowered pivotally supported on the other end side of the arm. a member, and a braking means for restraining the tilting of the receiving member by the frictional force of a spring inserted in close contact with the pivot position of the receiving member, and the damping means is provided between the moving element and the cam surface. A height adjustment device having an inclination adjustment function, characterized in that rotation of the arm is stopped by frictional force.

A second invention adds to the first invention a transmission means that is spanned between the pivot point of the arm and the pivot point of the receiving member and transmits the rotation of the arm via the braking means. It is characterized by the following features:

[For production]

The arm rotates about the pivot point, but the rotation is stopped by a frictional force generated between the slider, which is urged against the cam surface by a spring, and the cam surface.

The spring is expanded and contracted by a slider sliding on a cam surface as the arm rotates, and the spring force varies.

This variation is due to the external shape of the cam surface, so that when the arm rotates in the rising direction, the spring force gradually decreases, and when the arm rotates in the folding direction, the spring force gradually increases. As the spring force increases or decreases, the frictional force generated between the slider and the cam surface increases or decreases, and
The increase or decrease in this frictional force is proportional to the variation in the rotational moment of the loaded arm, and the rotation of the arm is stopped steplessly.

Further, since the load applied to the arm is balanced by the spring, the arm can be moved up and down with a small external force.

The receiving member of the placed object tilts while slipping between it and the spring due to the load exceeding the frictional force of the spring of the braking means.
When the load is released, the F! 11. Tilting is restrained by frictional force. Therefore, it is possible to steplessly tilt the object placed on the receiving member.

In addition to the above-mentioned effect, the second aspect of the present invention has an effect of moving the object placed in parallel in the vertical direction.

The rotation of the arm is transmitted to the receiving member of the object through the transmission means, and the object rotates by the same amount as the amount of rotation of the arm as the arm rotates. Therefore, the object to be placed can be moved in parallel in the vertical direction.

〔Example〕

Hereinafter, the present invention will be described in more detail based on illustrated embodiments.

FIG. 1 is a perspective view showing the height adjustment device according to the present invention in its highest standing state, FIG. 2 is a side view of the same device in its lowest folded state, and FIG. 3 is a schematic diagram of the same device. FIG. 4 is a sectional view of a main part showing how the receiving member for the object to be placed in the device is mounted.

In the figure, 1 is an arm whose one end is pivoted and the other end is rotatable.

The arm 1 is formed by forming a plate-like member into a U-shape and further bending a portion inward. A shaft 2 rotatably passes through the lower end of the U-shaped side wall, and both ends of the shaft 2 are fixedly supported by a bracket 4 fixed to the pace 3. As a result, the arm 1 is pivotally supported to rotate around the shaft 2.

Reference numeral 5 denotes a mover, which is attached to the arm 1 so as to be movable in the radial direction of its rotation.The mover 5 is formed into a box with two parallel spring housing spaces 5a, and is a shaped portion 1a of the arm 1.
Both sides of the arm 1 are supported so that the arm 1 is movable in the radial direction of rotation.

A cam 6 is fixed near the pivot portion of the arm 1 and has a cam surface on which the slider 5 slides. The cam 6 has a slider 5 on its circumferential surface.
The shaft 2 is fixed to the base 3 at one end of the arm 1 with the shaft 2 passing through it in the length direction.

7 springs are attached to the arm 1 and urge the mover 5 to press against the cam surface 6a. Two compression springs are used as the spring 7, and each spring 7 has a lower end housed in the spring housing space 5a of the slider 5, and an upper end that is a plate-shaped body attached to the approximate center of the arm 1. Spring receiver 8 which is bent into an L shape
It is attached in contact with the The mover 5 is thus urged against the cam surface 6a by the spring 7.

9 is a receiving member for an object to be placed, and is pivotally supported on the other end side of the arm 1. The receiving member 9 includes two brackets 12, 12 respectively fixed to two movable shafts 11, 1.1 which are rotatably fitted onto the shaft 10, and these brackets 12.
Place the object attached to 12! ! Place plate 13
It is composed of. The receiving member 9 may omit the mounting plate 13 and be composed only of the blacks 1-12, 12, in which case the objects to be placed may be directly attached to the blacks 1-12, 12.

Both ends of the shaft 10 are rotatably attached to bearings 14, 14 attached to the upper ends of both side walls of the arm 1, respectively, so that the receiving member 9 is pivotally supported on the other end side of the arm 1. . In this embodiment, this bearing 14 is biased to move in the centrifugal direction by a tension run 15 in order to apply a constant tension to a transmission means to be described later. Therefore, the bearing 14 is movably fitted into a U-shaped groove 1b provided at the upper end of the arm 1. In the second invention, this shaft 10 is constructed as described above, but in the first invention, both ends thereof are provided with bearings 1.
It is fixed at 4,14.

Reference numeral 16 denotes a braking means, which is a spring l)i! that is closely inserted into the pivot point of the receiving member 9. The tilting of the receiving member 9 is restrained by the ta force. The braking means 9 includes the above-mentioned movable shaft 11,
A fixed shaft 17 having the same diameter as the movable shaft 11 is inserted into the shaft 10, and a fixed shaft 17 is extended over the movable shaft 11 and the fixed shaft 17 in a close state, and one end 18a on the 7 side is a fixed shaft. 17 and the movable shaft 11 that is engaged through the shaft 10.
It is composed of a coil spring 18 whose other end 18b is a free end. The coil spring 18 is wound so as to have an inner diameter smaller than the outer diameter of the movable shaft 11 and the fixed shaft 17 in a free state, and is wound around both shafts 11 and 17 in an expanded state.
extrapolated to Further, the fixed shaft 17 is restrained from rotating relative to the shaft 10 by one end 18a of a coil spring 18. Therefore, when the receiving member 9 tries to tilt around the shirt 1-10 via the movable shaft 11, the coil spring 18
) iIta force prevents the tilting. The receiving portion 49 is connected to the movable shaft 1 so that a load exceeding the frictional force is applied thereto.
1 and the coil spring 18 while causing a slip. Reference numeral 19 denotes a transmission means, which is a component added to the second invention, and is spanned between the pivot point of the arm 1 and the pivot point of the receiving member 9, and controls the rotation of the arm 1 by the braking means. 16. The transmission means 9 is provided on both sides of the arm 1 and includes pulleys 20 fixed to both ends of a shaft 20, which is the center of rotation of the arm 1, and a receiving member 9.
It is composed of pulleys 21 fixed to both ends of a shaft 10, which is a pivot axis of the , and an endless belt 22 stretched between the pulleys 20 and 21 of the . Therefore, in the embodiment of the second invention, the rotation of the shaft 10 is controlled by the belt 2.
The rotation of the arm 1 is transmitted to the shaft 10 via the transmission means 19, and the rotation of the shaft 10 is transmitted to the receiving member 9 via the braking means 16.

Further, the spring force of the spring 7 and the external shape of the cam surface 6a described above are designed to balance the rotational moment of the arm 1 when an object is placed on the placement plate 13.

The height adjustment device configured as described above operates as follows.

First, the height adjustment device (second
3), an object to be placed, for example, a display of office equipment such as a word processor or a personal computer, or a monitor television is placed on the placing plate 13. After that, when the mounting plate 13 is manually lifted (in the direction of arrow A in Fig. 3), the arm 1 rotates around Nyaf) and 2.
The mover 5 slides on the cam surface 611 of the cam 6. Due to this sliding of the slider 5, the slider 5 asymptotically approaches the shaft 2 side due to the external shape of the cam surface 6a, and thereby the spring force of the spring 7 gradually decreases, causing friction between the slider 5 and the cam surface 6a. also gradually decreases. This l! Since the J friction force is proportional to the rotational moment of arm 1 when the object is placed on it, it is not possible to stop rotation of arm 1 at an arbitrary height even if this lifting external force is released. You can do it. Therefore, the height adjustment operation of the placed object is performed steplessly. In addition, the spring force
! Since it is designed to balance the load applied by the ornament, a small external force is sufficient for the lifting.

In the second embodiment of the invention, the height 'fJQM' is determined by moving the object placed on the Ia placing plate 13 in parallel while maintaining its posture. One end of the belt 22 of the transmission means 19 is locked to a fixed pulley 22, so that when the arm 1 rotates in the
a is pulled toward the mouth and the other side 22b is pulled in the convex direction (see Figure 2) and rotates in the same direction, and this rotation of the bell l-22 rotates the pulley 21 by the amount that the arm 1 rotates. let

The rotation of the pulley 21 is performed integrally with the shaft 10, and the rotation of the shaft 10 is transmitted to the receiving member 9 via the braking means 16. In this way, the receiving member 9 rotates by the amount that the arm 1 rotates, so that the above-mentioned parallel movement is possible.

Further, the inclination angle of the object placed at a desired height can be adjusted as follows.

Since the receiving member 9 on which the object is placed is stopped from tilting by the frictional force generated between the coil spring 18 of the braking means 16 and the movable shaft 11, the load exceeding the frictional force can be avoided. When applied to the receiving member 9, the receiving member 9 tilts around the shaft 10 while slipping between the coil spring 18 and the movable shaft 11. Then, when the load is released, the tilting of the receiving member 9 is stopped by the frictional force, so that the inclination of the object placed on the receiving member 9 can be adjusted steplessly.

Furthermore, the height of the object to be placed can be easily lowered by applying six loads in two directions to the arm 1, as shown in FIG. At this time, in the embodiment of the second invention, the belt 22 of the transmission means 19 rotates in the opposite direction to when it is raised, and the receiving member 9 rotates by the amount of rotation of the arm 1, similarly to when it is raised. The placed object descends and becomes lower. In this lowering operation, the mover 5 and the cam surface 6aJ2! At this time, the slider 5 moves in the centrifugal direction due to the outer shape of the cam surface 6a and compresses the spring 7. Therefore, the spring force of the spring 7 gradually increases as the arm 1 descends, and
The frictional force generated between a and a also gradually increases. This gradual increase in frictional force is proportional to the gradually increasing rotational moment of arm 1. Then, when the load in the descending direction (two directions) is released, the rotation of the arm 1 is stopped due to the frictional force generated between the slider 5 pressed and urged by the spring force of the spring 7 and the cam surface 6a, and the rotation of the arm 1 is stopped. The figurine can be maintained at any height.

Therefore, the desired inclination angle and height of the object to be placed can be easily obtained.

〔Effect of the invention〕

As described above, the present invention stops the rotation of an arm whose one end is pivotally supported and whose other end rotates by the frictional force generated between the cam surface and the slider that is pressed against the cam surface by a spring, In addition, since the rotation of the receiving member for the object attached to the other end of the arm is restrained by the frictional force of the spring inserted in close contact with the pivot point of the receiving member, the tilt angle can be adjusted with one device. Adjustment and height adjustment are possible, and these adjustments can be made steplessly.

According to the present invention, it is possible to accurately determine the optimal height and inclination for the viewer to place the object. In addition to the above-mentioned effects, the second invention also has the effect that when adjusting the height of the object, the object can be moved in parallel in the vertical direction while keeping its posture the same.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the device of the present invention in a standing state, Fig. 2 is a side view of the device in the folded state, Fig. 3 is a cross-sectional view of essential parts of the device in the folded state, and Fig. 4 is a sectional view of the main part of the device in the folded state. This is a cross-sectional view of the main parts showing the installation of the receiving member for the placed object. 1. Arm, 4. Bracket/Soto, 5. Mover, 6.
Cam, 6a ・Cam surface, 7 Spring, 11 ・Movable shaft, 14
・Bearing, 16. Braking means, 17. Fixed shaft, 18 Coil spring, 19. Transmission means, 20, 21.. Pulley, 22.. Belt.

Claims (2)

[Claims] (1) An arm that is pivoted at one end and rotates at the other end;
a mover attached to the arm so as to be movable in the rotation radius direction; a cam fixed near a pivot point of the arm and having a cam surface on which the mover slides; Frictional force between a spring that presses the child against the cam surface, a receiving member for the object to be placed pivotably supported on the other end of the arm, and a spring externally inserted in close contact with the pivoting position of the receiving member. and a braking means for stopping the tilting of the receiving member, and has an inclination adjustment function characterized in that rotation of the arm is stopped by a frictional force generated between the moving element and the cam surface. Height adjustment device. (2) an arm that is pivoted at one end and rotates at the other end;
a mover attached to the arm so as to be movable in the rotation radius direction; a cam fixed near a pivot point of the arm and having a cam surface on which the mover slides; Frictional force between a spring that presses the child against the cam surface, a receiving member for the object to be placed pivotably supported on the other end of the arm, and a spring externally inserted in close contact with the pivoting position of the receiving member. a braking means for restraining the tilting of the receiving member; and a transmission means for transmitting rotation of the arm via the braking means, the transmission means being spanned between a pivot point of the arm and a pivot point of the receiving member. A height adjustment device having an inclination adjustment function, characterized in that rotation of the arm is stopped by a frictional force generated between the movable element and the cam surface.