JP2000146086A - Tilt angle adjusting mechanism for equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent engagement of a locking member with an adjusting bolt from being placed in an incomplete condition, by engaging/disengaging the adjusting bolt by the locking member, operating its action by an operating lever, and energizing it so as to be selectively positioned in an engaging position and a separating position by an energizing member. SOLUTION: In case of supporting an equipment at a prescribed angle, an operating lever 50 is turned to move a locking member 30 through a link piece 40 toward an adjusting bolt 20. When this operation turns the operating lever 50 to a position beyond a neutral point, the operating lever 50 is further turned toward the forward in a turning direction by energizing force of an energizing member 51, and the locking member 30, abutting to the adjusting bolt 20 from a direction orthogonal to its axial line, is engaged with the adjusting bolt 20. Here by energizing force of the energizing member 51, the locking member 30 is made in adhesion to the adjusting bolt 20, to restrict its vertical movement. The equipment is mounted in a set up surface in this condition, but a tilt angle of the equipment is held at an angle matched with a protruding amount of the adjusting bolt 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt angle adjusting mechanism for a device such as a computer display or an overhead projector, which adjusts a tilt angle of the device.

[0002]

2. Description of the Related Art Conventionally, in a device such as a computer display or an overhead projector, in order to adjust an angle of a display surface or a projection angle, a height of the front side is adjusted, for example, on a bottom front side of the device. An inclination angle adjusting mechanism for adjusting the inclination angle of the device is provided.

[0003] An example of the structure of such a device for adjusting the tilt angle of a device is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-2485. This technology includes an adjusting bolt provided so as to protrude from the bottom front side of the device and slidably in a vertical direction, a locking member which is disengaged from the adjusting bolt from a direction orthogonal to the axis thereof, and Biasing means for urging the stop member toward the adjustment bolt and holding them in an engaged state, and moving the locking member against the urging member to adjust the adjustment bolt. By disengaging the engagement bolt, the adjustment bolt is slid in the axial direction, thereby roughly adjusting the amount of the adjustment bolt projecting from the device, and releasing the pressing force on the locking member. The vertical movement of the adjusting bolt is restrained by engaging the locking member with the adjusting bolt again, and the amount of protrusion of the adjusting bolt is finely adjusted by rotating the adjusting bolt in this state. Like this By adjusting the projecting amount of the bolt, by adjusting the floating amount of the front side of the equipment to be supported by the adjusting bolt is adapted to adjust the tilt angle of the device.

[0004]

In the prior art, when the adjustment bolt is roughly adjusted in the amount of protrusion, the locking member is constantly pressed against the urging force of the urging member. Therefore, it is necessary to keep the engagement with the adjustment bolt in a released state, but in such an operation state, the stop position of the locking member is unstable. If the stop position of the locking member is unstable as described above, the adjusting bolt may be moved in a state where the locking member and the adjustment bolt are incompletely detached. Galling may occur between the locking member and the adjustment bolt, and the threads of both may be cut off, and the locking force on the adjustment bolt may be reduced when the locking member is engaged with the adjustment bolt. There is. In addition, when the locking force of the adjustment bolt is reduced, the engagement between the locking member and the adjustment bolt is released due to the weight of the device, and the device may drop.

The present invention has been made in view of such a conventional problem, and clearly distinguishes a locked state and a released state of an adjustment bolt for adjusting an inclination angle of a device.
It is an object of the present invention to provide a tilt angle adjusting mechanism for a device that can reliably hold either the locked state or the released state.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for adjusting a tilt angle of an apparatus, comprising: an adjusting bolt mounted on the apparatus so as to be vertically movable; A locking member to be engaged with the bolt from a direction orthogonal to the axis thereof, and operating means for moving the locking member between two positions, a position where the locking member is engaged with the adjustment bolt and a position where the locking member is separated from the adjustment bolt. The operating means comprises: a link piece rotatably connected to the locking member; and a link piece rotatably connected to the link piece. An operation lever for engaging and disengaging the member with respect to the adjustment bolt, and selectively biasing the operation lever to one of a position for engaging the locking member with the adjustment bolt and a position for separating the locking member from the adjustment bolt. By the biasing member That has been made is characterized in. According to a second aspect of the present invention, there is provided a tilt angle adjusting mechanism for a device, wherein the operation lever according to the first aspect is rotatably provided, and the link piece is located at a position separated from a rotation center of the operation lever. It is characterized by being rotatably connected. According to a third aspect of the present invention, there is provided a tilt angle adjusting mechanism for a device, wherein the locking member according to the second aspect is provided in a pair so as to sandwich the adjustment bolt, and the link member is provided on each locking member. Is rotatably connected, and the other end of each of the link pieces is rotatably connected to both sides of the operation lever with respect to the center of rotation thereof. Is what you do.
According to a fourth aspect of the present invention, in the tilt angle adjusting mechanism for a device, a neutral point is provided in the middle of a rotation range of the operation lever according to the second or third aspect, and the operation lever sets the neutral point. When the operating lever is turned over, the operating lever is biased by the biasing member in a direction away from the neutral point. According to a fifth aspect of the present invention, there is provided a tilt angle adjusting mechanism for a device, comprising: an adjusting bolt mounted on the device so as to be vertically movable; and a locking member engaged with the adjusting bolt from a direction perpendicular to the axis thereof. And a first urging member for urging the locking member toward the adjusting bolt, and a position for engaging the locking member with the adjusting bolt and a position separating from the adjusting bolt. Operating means for moving, the operating means contacting the locking member from the side opposite to the biasing direction of the first biasing member, and abutting the other end of the link piece. An operating lever for disengaging the engaging member from the adjusting bolt by moving the link piece in the axial direction, and adjusting the operating lever to a position at which the locking member is engaged with the adjusting bolt. Any one of the positions separated from the bolt It is characterized in being constituted by a second biasing member which selectively energized to. The tilt angle adjusting mechanism for a device according to claim 6 of the present invention further includes an adjusting bolt mounted on the device so as to be vertically movable, and a locking member that is engaged with the adjusting bolt from a direction perpendicular to the axis thereof. An operation for urging the locking member toward the adjustment bolt, and an operation for moving the locking member between two positions, a position where the locking member is engaged with the adjustment bolt and a position separated from the adjustment bolt. Means, and the operating means includes a cam follower provided on the locking member, the cam follower being slidably engaged with the cam follower, and the cam follower being moved to a position where the engaging member is engaged with the adjustment bolt. And the position separated from the adjustment bolt.
A cam groove having two locking portions for locking at a position, an operating member for sliding the cam follower along the cam groove, and a bias for urging the locking member to engage with the adjustment bolt. And a biasing member.

According to the tilt angle adjusting mechanism for a device according to any one of the first to sixth aspects of the present invention, the operating lever for operating the locking member for engaging and disengaging the adjusting bolt is biased. By urging the locking member to be selectively positioned between the engagement position with the adjustment bolt and the separation position by the member, the locking member is moved between the engagement position with the adjustment bolt and the separation position. Force to position. Accordingly, it is possible to reliably prevent the engagement between the locking member and the adjustment bolt from being incomplete, and to suppress a decrease in the locking force to the adjustment bolt.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 3 and FIG.

As shown in FIG. 10, the inclination angle adjusting mechanism of the device according to the present embodiment is provided at two places spaced apart in the width direction of the device 60 on the front side of the bottom of the device 60. More specifically, a pair of fixed legs 61 made of an elastic material such as rubber are integrally attached to the bottom rear side of the device 60, and each of the tilt angle adjustment mechanisms is provided to protrude downward from the bottom surface of the device 60. An adjusting bolt 20 slidably mounted in a vertical direction and a locking member which is detachably engaged with a thread of the adjusting bolt 20 to restrain the adjusting bolt 20 from moving up and down. 30, an operating lever 50 for moving the locking member 30 to the disengaged position, and a link piece 40 for transmitting the movement of the operating lever 50 to the locking member 30
As shown in FIG. 1, the operating lever 50 is selectively moved to one of a position where the locking member 30 is engaged with the adjustment bolt 20 and a release position separated from the adjustment bolt 20. And an urging member 51 positioned at the position.

At the lower end of the adjusting bolt 20, a support leg 10 made of the same material as the fixed leg 61 is integrally attached, and the support leg 10 always projects from the lower surface of the device 60. The guide is guided by a guide member (not shown) so as to be movable only in the axial direction.

As shown in FIG. 10, the operation lever 50 is mounted in a housing 52 fixed to a device 60, and a pivot 50a integrally projecting from upper and lower surfaces is rotatably mounted on the housing 52. By being fitted, the operation lever 50 is rotatably connected to the device 60.

The operation lever 50 has a pivot 50
A claw 50b extending radially from the axis of a is protruded integrally, and the urging member 51 is interposed between the claw 50b and the inner wall of the housing 52. In the present embodiment, the urging member 51 uses a leaf spring curved in an arc shape, and the claw 51b is slidably abutted. And this urging member 5
Reference numeral 1 denotes a position at which the elastic deformation is maximized by a claw 50b that is moved in accordance with the rotation of the operation lever 50 (the biasing member 5).
The position at which the urging force generated by 1 is coincident with the line connecting the contact point between the urging member 51 and the claw 51b and the axis of the pivot 50a of the operation lever 50 is set as the neutral point, and the operation lever 50b When the operating lever 50 is rotated beyond the neutral point, the operating lever 50 is biased in a direction away from the neutral point. Therefore, the operation lever 5
0 is always urged toward one end of the pivoting range within the pivotable range.

One end of the link piece 40 is rotatably connected to the locking member 30, and the other end of the link piece 40 is turned to a position separated from the center of rotation of the operating lever 50, that is, the pivot 50a. It is movably connected. Further, the link piece 40 is set to have such a length that the operation lever 50 is located at a position where the urging member 51 is deformed by a predetermined amount when the locking member 30 is engaged with the adjustment bolt 20. ing.

In the tilt angle adjusting mechanism for a device according to the present embodiment configured as described above, when the device 60 is supported at a predetermined angle, the operation lever 50 is rotated to cause the locking member 30 to move. It is moved toward the adjustment bolt 20 via the link piece 40. When the operation lever 50 is rotated to a position beyond the neutral point by this operation, at that time, the operation lever 50 is actuated by the urging force of the urging member 51.
Is further rotated forward in the rotation direction, so that the locking member 30 is brought into contact with the adjustment bolt 20 from a direction orthogonal to the axis thereof and is engaged with the adjustment bolt 20. Then, in this state, the operation lever 5
0 is urged in the rotation direction by the urging force of the urging member 51, and the urging force of the locking member 30
Is crimped to the adjustment bolt 20, and the vertical movement of the adjustment bolt 20 is restrained. In this state, the device 60 is installed by placing the device 60 on the installation surface.
As described above, since the engagement between the locking member 30 and the adjustment bolt 20 is reliably performed by the urging force of the urging member 51, the relative movement between the adjustment bolt 20 and the device 60 is restricted. , The inclination angle of the device 60 is maintained at an angle commensurate with the amount of protrusion of these adjustment bolts 20.

The fine adjustment of the inclination angle of the device 60
This is performed by rotating each adjustment bolt 20 around the axis. When the adjustment bolt 20 is rotated as described above, the adjustment bolt 20 and the locking member 30 are relatively moved in accordance with the pitch of the thread, whereby the adjustment bolt 20 projects from the device 60. The amount is finely adjusted, resulting in a fine adjustment of the tilt angle of the device 60.

When the inclination angle of the device 60 is to be largely changed, first, the operation lever 50 is moved to the locking member 30.
Is rotated in a direction to separate from the adjustment bolt 20. When the rotation position of the operation lever 50 exceeds the neutral point, the operation lever 50 is forcibly rotated in the rotation direction by the urging force of the urging member 51, and the operation lever 50 rotates with the rotation of the operation lever 50. The locking member 30 is forcibly separated from the adjustment bolt 20 and the operation lever 50 is
The locking member 30 is held at a position separated from the adjustment bolt 20 by being held at the terminal end in the rotation direction by the urging force of 1. In this state, the adjustment bolt 20
Is held in an unlocked state, the adjustment bolt 20 can be freely moved up and down. After adjusting the position of the adjustment bolt 20 to a required length, the operation lever 50
Is rotated in the opposite direction. When the operation of rotating the operation lever 50 in the reverse direction is performed, the locking member 30 is moved toward the adjustment bolt 20, and as described above, when the operation lever 50 exceeds the neutral point, The urging member 51 is forcibly rotated forward in the turning direction, and the locking member 30 is engaged with the adjustment bolt 20 by a predetermined urging force. As a result, the movement of the adjustment bolt 20 is restricted, and is held at the adjustment position.

As described above, in the present embodiment, the operation lever 50 is always rotated toward one of the end portions within the rotatable range, and the operation lever 50 is forcibly pushed to one of these end portions. Is maintained. As a result, the locking member 30 and the adjustment bolt 20 are forcibly held in one of the engaged state and the separated state. Therefore, it is possible to prevent the locking member 30 and the adjustment bolt 20 from being in an incompletely engaged state, and to prevent the thread of the adjustment bolt 20 and the locking member 30 from being screwed due to galling or the like during the angle adjustment operation. Crushing can be reliably prevented, and the locking member 30 and the adjustment bolt 20
The holding function of the device 60 can be stably held for a long period of time by preventing the locking force from lowering.

The various shapes, dimensions, and the like of the components shown in the above embodiment are merely examples, and can be variously changed based on design requirements and the like.

For example, in the above-described embodiment, an example is shown in which the biasing member 51 is constituted by an arc-shaped leaf spring. However, instead of this, as shown in FIG. The biasing member 51 can also be used.

Further, as shown in FIG.
Is provided so as to be slidable with respect to the housing 52 in the engaging and disengaging direction of the locking member 30, and the biasing member 71 is formed in a chevron shape and is arranged in parallel with the sliding direction of the operation lever 70. Is also possible. Further, as shown in FIG. 6, the locking member 30 and the operation lever 50 are arranged so as to sandwich the adjustment bolt 20, and the locking member 30 is pulled toward the operation lever 50 by the link piece 40 so that the adjustment bolt 20 It is also possible to engage with. Also,
As shown in FIG. 7, the locking members 30 are arranged on both sides of the adjustment bolt 20, and these locking members 30 are connected by a pair of link pieces 40 to the pivot 50 a of the operation lever 50.
It is also possible to adopt a configuration in which both sides are connected rotatably. Further, as shown in FIG. 8, a heart-shaped cam groove 80 is formed in the housing 52, and a cam follower 81 slidably engaged with the cam groove 80 is provided in the link piece 40, and the cam groove 80 is formed in the cam groove 80. , The cam follower 81 is engaged with the locking member 30.
A locking portion 80a for holding the lock member at a position separated from the adjustment bolt 20 and a locking member provided at a position further away from the adjustment bolt 20 than the locking portion 80a and the cam follower 81 being in a free state. Cam follower releasing portion 8 for pressing the adjustment member 30 against the adjustment bolt 20 by the urging member 51
0b may be provided. FIG.
As shown in (1), the locking member 30 and the operation lever 50 are provided at positions sandwiching the adjustment bolt 20, and the locking member 30 is pressed against the locking member 30 toward the adjustment bolt 20.
A second urging member 91 having the same configuration and function as in FIG. 1 is provided in the housing 52.
Is further provided between the operation lever 50 and the locking member 30 in a state where only movement in the axial direction is permitted,
Further, it is also possible to adopt a configuration in which a link piece 40 that is brought into contact with the locking member 30 and the operation lever 50 is interposed.

[0021]

As described above, according to the first aspect of the present invention,
According to the tilt angle adjusting mechanism for a device according to claim 7, the operating lever is always rotated by the urging member toward one of the end portions within the rotatable range, and the operation lever is rotated by the biasing member. Can be compulsorily held. As a result, the locking member and the adjustment bolt are
It is possible to prevent the locking member and the adjustment bolt from being incompletely engaged with each other by forcibly holding the locking member in one of the engaged state and the separated state. Therefore, it is possible to reliably prevent the screw thread of the adjusting bolt and the locking member from being crushed due to galling or the like at the time of the angle adjusting operation, and to prevent a reduction in the locking force between the locking member and the adjusting bolt. In addition, the holding function of the device can be stably held for a long time.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 2 shows an embodiment of the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 3 is an external perspective view showing an embodiment of the present invention.

FIG. 4 shows another embodiment of the present invention, wherein (a) is a plan view and (b) is a side view.

FIGS. 5A and 5B show another embodiment of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a side view.

6A and 6B show another embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a side view.

7 shows another embodiment of the present invention, wherein (a) is a plan view and (b) is a side view. FIG.

FIG. 8 is a plan view showing another embodiment of the present invention.

FIG. 9 is a plan view showing another embodiment of the present invention.

FIG. 10 is a schematic diagram of a device to which an embodiment of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Support leg 20 Adjusting bolt 30 Locking member 40 Link piece 50 Operating lever 50a Axis 50b Claw 51 Urging member 52 Housing 60 Equipment 61 Fixed leg 70 Operating lever 71 Biasing member 80 Cam groove 80a Locking portion 80b Cam follower releasing portion 81 Cam follower 90 First urging member 91 Second urging member

Claims (6)

[Claims] 1. An adjusting bolt mounted on a device so as to be movable up and down, a locking member to be engaged with the adjusting bolt from a direction perpendicular to an axis thereof, and the locking member being engaged with the adjusting bolt. Operating means for moving between a position and a position separated from the adjusting bolt, the operating means comprising: a link piece rotatably connected to the locking member; An operating lever that is freely connected and moves the link piece in the axial direction to disengage the engaging member from the adjusting bolt, and engages the operating lever with the locking member to the adjusting bolt. A tilting angle adjusting mechanism for a device, comprising: a biasing member that selectively biases one of a position and a position separated from the adjustment bolt. 2. The operating lever is provided rotatably,
The tilt angle adjusting mechanism for a device according to claim 1, wherein the link piece is rotatably connected to a position separated from a rotation center of the operation lever. 3. A pair of locking members are provided so as to sandwich the adjusting bolt, one end of the link piece is rotatably connected to each locking member, and each of the link pieces is The other end of the operation lever,
3. The tilt angle adjusting mechanism for a device according to claim 2, wherein the tilt angle adjusting mechanism is connected to both sides of the rotation center so as to be rotatable. 4. A neutral point is provided in the middle of a rotation range of the operation lever, and when the operation lever is rotated beyond the neutral point, the operation lever is moved by the urging member to the neutral point. The inclination angle adjusting mechanism for a device according to claim 2 or 3, wherein the device is biased in a direction away from the device. 5. An adjusting bolt mounted on a device so as to be movable up and down, a locking member to be engaged with the adjusting bolt from a direction perpendicular to the axis thereof, and a biasing member for urging the locking member toward the adjusting bolt. A first urging member to be moved, and operating means for moving the locking member between two positions, a position where the locking member is engaged with the adjustment bolt and a position where the locking member is separated from the adjustment bolt. A link piece that is brought into contact with the locking member from the side opposite to the biasing direction of the first biasing member, and the link piece that is brought into contact with the other end of the link piece to move in the axial direction, An operation lever for engaging and disengaging the engagement member with respect to the adjustment bolt; and selectively operating the operation lever between a position where the locking member is engaged with the adjustment bolt and a position where the engagement member is separated from the adjustment bolt. Second to energize
And a biasing member. 6. An adjusting bolt mounted on a device so as to be vertically movable, a locking member to be engaged with the adjusting bolt from a direction perpendicular to the axis thereof, and a biasing member for urging the locking member toward the adjusting bolt. And an operating means for moving the locking member between two positions, a position where the locking member is engaged with the adjustment bolt and a position separated from the adjustment bolt, and the operating means includes the locking member. And the cam follower is slidably engaged with the cam follower,
A cam groove having two locking portions for locking the cam follower at two positions, a position where the engaging member is engaged with the adjustment bolt and a position separated from the adjustment bolt; and A tilt angle adjusting mechanism for a device, comprising: an operating member that slides along a cam groove; and an urging member that urges the locking member in a direction to engage the adjustment bolt.