JP2008191556A - Elevation mechanism for projector and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevation mechanism for a projector achieving the reduction of cost by obtaining a mechanism making an elevation member freely ascend/descend by depressing an elevation button with simple constitution comprising a small number of parts. <P>SOLUTION: By depressing the elevation button 3, the actuation projection 3c of the elevation button 3 presses the action piece 6a of a turning member 6 to turn the turning member 6, so as to release meshing of the tooth groups 6c and 12c of an actuation piece 6b and the leg part 12a of the elevation member 12, and the foot part 12b of the elevation member 12 is protruded after making the elevation member 12 freely ascend/descend. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevating mechanism for changing an elevation angle of a projector used on a desk or a floor, and a projector including the elevating mechanism.

  A conventional projector lifting mechanism will be described with reference to the drawings.

  FIG. 4 is a side sectional view showing a state in which the raising / lowering operation of the raising / lowering member is locked in the vicinity of the center of the case front portion of the conventional projector. On the upper surface 102b of the case 102 of the projector 101, an up / down button 103 is provided so as to be movable up and down by a predetermined vertical distance. The up / down button 103 has a table-like operation part 103a that can be projected and retracted from an opening 104 provided on the upper surface 102b of the case 102, and a pedestal part 103b that projects outward from the lower edge of the operation part 103a. Is moved up and down with the position contacting the lowermost defined rib 105 integrally formed inside the upper surface 102a of the case 102 as the lowest position.

  Below the lift button 103, a rod-shaped unlocking member 106 is disposed on a guide rail 107 provided integrally with the front surface 102a of the case 102 so as to be slidable in the vertical direction. An action piece 106 a extends backward from the upper end of the lock release member 106, and the action piece 106 a is always in contact with the bottom surface of the base portion 103 b of the lift button 103. At the lower end of the unlocking member 106, a claw portion 106b having a slope on the front is formed.

  Below the lock release member 106, a rectangular tube-shaped lock member 108 having a square hole 108a penetrating vertically is provided in the left-right direction (front-rear direction in FIG. 4) by a guide rib 109 integrally provided on the bottom surface 102c of the case 102. ) Is restricted so as to be movable in the front-rear direction (left-right direction in FIG. 4). A working groove 108b having a slope on the front is formed on the upper surface of the lock member 108, and the front slope of the claw portion 106b of the lock release member 106 is always in contact with the front slope of the working groove 108b. On the front wall surface of the square hole 108b of the lock member 108, a tooth group 108c arranged in the vertical direction is formed. The compressed compression springs 111 are disposed on the projections 108d and 110 that protrude from the front surface of the lock member 108 and the front surface 102a of the case 102, respectively, thereby urging the lock member 108 rearward.

  Behind the unlocking member 106, the elevating member 112 is slidable in the vertical direction on the guide rail 113 integrally formed with the guide rib 109 on the bottom surface 102c of the case 102 (movable up and down) by the prismatic leg portion 112a. It is arranged. The leg portion 112a is inserted through the square hole 108a of the lock member 108 and the opening 114 provided in the front portion of the bottom surface 102c of the case 102, and protrudes below the bottom surface 102c of the case 102 at the lower end to contact the surface of the desk or floor. It has a disk-shaped foot 112b in contact therewith. When the elevating member 112 is at the uppermost position, the foot portion 112 b fits into the bottom surface 102 c of the case 102 by fitting into a recess 115 formed like a countersink around the opening 114. On the front surface of the leg portion 112a, a group of teeth 112c arranged in the vertical direction is formed in almost the entire region. A part of the tooth group 112c meshes with the tooth group 108c of the lock member 108 in a state where the lock member 108 is urged rearward, and locks the lifting operation of the lifting member 112.

  With the above configuration, as shown in FIG. 4, when the operation portion 103 a of the lift button 103 is pressed downward, the pedestal portion 103 b acts on the action piece 106 a of the unlocking member 106 and moves the unlocking member 106 downward. Press down. As a result, the claw portion 106b of the lock release member 106 acts on the action groove 108b of the lock member 108, and the lock member 108 is pushed forward against the bias. As a result, as shown in FIG. 5, the meshing (locking) of the tooth groups 108c and 112c is released, and the elevating member 112 can be raised and lowered. When the lifting member 112 is lifted and lowered, and the amount of protrusion of the foot 112b is adjusted appropriately, and the force that has pressed the lifting button 103 is removed, the teeth 108c and 112c are engaged again, so the lifting member 112 is locked. The With the above operation, the elevation angle of the projector 101 can be adjusted while raising the front portion of the case 102 by a required height.

Note that Patent Documents 1 to 3 relate to a technique for raising and lowering a projector suspended on a ceiling or the like, and change the elevation angle of a projector to be used on a desk or floor as described above. It is not a thing. Patent Document 4 discloses a technique for adjusting the leg height by a mesh release operation that pushes a meshing member itself that meshes with a screw shaft that can be moved up and down. The downward force that presses down is converted into a force that moves the meshing member (stopper) forward to release the meshing. Patent Document 5 relates to a technique for changing the elevation angle of a projector used on a desk or a floor surface. However, since a drive mechanism such as a motor is used, a lift button is pressed. It does not relate to a manual lifting mechanism.
Japanese Utility Model Publication No. 6-10942 Japanese Patent Laid-Open No. 9-247594 JP 2006-126625 A Japanese Patent Laid-Open No. 10-2485 Republished patent WO2003 / 104893

  In the above configuration, in order to realize a mechanism that allows the elevating member 112 to be moved up and down by pressing the elevating button 103, it is necessary to interpose two parts of the lock release member 106 and the lock member 108, and the configuration is complicated. In addition, there is a problem that the number of parts is large and the cost is high.

  The present invention has been made in view of the above-described conventional problems, and the cost can be reduced by realizing a mechanism that allows the elevating member to be raised and lowered by pressing the elevating button with a simple configuration having a small number of parts. It is an object of the present invention to provide a projector lifting mechanism and a projector.

  In order to achieve the above object, a projector according to claim 1 has an operation projection that protrudes downward, a lift button provided on the upper surface of the case so as to be movable up and down by a predetermined vertical distance, and a substantially horizontal rearward extension. An operating piece in which the operating projection abuts on the top end of the upper surface, an operating piece that extends substantially vertically downward and is urged rearward by a compression spring disposed between the lower end of the front surface and the front surface of the case, and the operating piece The teeth are arranged in the vertical direction on the back surface of the case, and are inserted into a rotation member that is pivotally supported in the case so as to be rotatable in the front-rear direction, and an opening provided in the bottom front portion of the case A prismatic leg portion, a foot portion that is integrally formed at the lower end of the leg portion and that can protrude below the bottom surface of the case, and a front side of the leg portion that is provided side by side in the vertical direction. A tooth group that meshes with the tooth group, and is arranged to be movable up and down behind the working piece. And when the lifting button is depressed, the operating projection of the lifting button pushes the action piece of the rotating member to rotate the rotating member, thereby rotating the rotating member. The engagement between the teeth of the leg portions of the operating piece and the elevating member is released, the elevating member is made to be movable up and down, and then the foot portion of the elevating member is protruded.

  According to a second aspect of the present invention, there is provided a lifting device for the projector having an operating protrusion protruding downward, and a lifting button provided on the upper surface of the case so as to be movable up and down by a predetermined vertical distance, and extending substantially horizontally rearward. It has a working piece with which the protrusion abuts, a working piece that extends substantially vertically downward and is biased rearward, and a tooth group that is arranged in the vertical direction on the back surface of the working piece. A pivot member pivotally supported in a direction, a prismatic leg portion inserted through an opening provided in a front portion of the bottom surface of the case, and a bottom portion of the case formed integrally with a lower end of the leg portion. And a tooth group that is arranged in the vertical direction on the front surface of the leg portion and meshes with the tooth group of the rotating member, and is disposed so as to be movable up and down behind the operating piece. An elevating member, and when the elevating button is pressed, The operating protrusion pushes the action piece of the rotating member to rotate the rotating member to release the engagement between the operating pieces of the rotating member and the teeth of the leg portions of the elevating member, and the elevating It is characterized in that the leg of the elevating member is protruded after allowing the member to move up and down.

  According to a third aspect of the present invention, there is provided the projector lifting apparatus according to the second aspect, wherein the operating protrusion of the lifting button is brought into contact with the top end portion of the action piece of the rotating member. It is a feature.

  According to a fourth aspect of the present invention, there is provided a lifting device for the projector according to the second or third aspect, wherein a compression spring is provided between the front lower end portion of the operating piece of the rotating member and the front surface of the case. Is arranged.

  According to a fifth aspect of the present invention, there is provided a projector lifting apparatus according to any one of the second to fourth aspects, wherein a rib for restricting movement of the rotating member in the rotational axis direction is provided on the upper surface of the case. It is characterized by its convexity.

  The projector lifting apparatus according to claim 6 is the projector lifting apparatus according to any one of claims 2 to 5, wherein a countersink for housing the foot portion of the lifting member is provided on the bottom surface of the case. It is characterized by.

  According to the projector of the first aspect, the mechanism that allows the elevating member to be moved up and down by pressing the elevating button can be realized only by interposing one rotating member, and two parts of the unlocking member and the locking member are necessary. Compared to the conventional configuration, the number of parts is small, and the cost can be reduced. That is, the rotating member serves as the functions of the conventional unlocking member and the locking member, thereby simplifying the configuration and reducing the number of parts.

  Moreover, since the operation protrusion of the raising / lowering button is in contact with the top end portion of the action piece of the turning member far from the turning fulcrum, the raising / lowering member can be unlocked with a small force.

  Furthermore, since the compression spring urges the lower end of the front surface of the working piece of the turning member far from the turning fulcrum, the urging force of the compression spring can be applied to the lock of the elevating member as much as possible.

  According to the lifting and lowering device of the projector according to claim 2, the mechanism that allows the lifting and lowering member to freely move up and down by pressing the lifting and lowering button can be realized only by interposing one rotating member, and the two parts of the unlocking member and the locking member are provided. Compared to the conventional configuration that is necessary, the number of parts is small, and the cost can be reduced. That is, the rotating member serves as the functions of the conventional unlocking member and the locking member, thereby simplifying the configuration and reducing the number of parts.

  According to the lifting and lowering device of the projector according to the third aspect, the lifting and lowering member can be unlocked even if the lifting and lowering button is pressed with a small force since the lifting and lowering device is in contact with the top end surface far from the pivot point.

  According to the lifting device of the projector according to the fourth aspect, since the lower end portion of the front surface that is far from the rotation fulcrum is urged, the urging force of the compression spring can be applied to the locking of the lifting member to the maximum extent.

  According to the projector lifting apparatus of claim 5, since the movement of the rotating member in the rotating shaft direction is restricted by the rib provided on the upper surface of the case, the meshing of the teeth of the rotating member and the lifting member is ensured. Can do.

  According to the projector lifting apparatus of the sixth aspect, when the legs of the lifting member are housed in the countersink formed on the bottom surface of the case, the lifting member becomes inconspicuous from the appearance, so that the aesthetics of the projector is improved.

  An embodiment of a lifting mechanism of a projector according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an external appearance of a projector to which the present invention is applied. As shown in FIG. 1, the projector 1 is placed on a base BS corresponding to an installation surface such as a desk or a floor surface, and includes a projection port 2 h on the front surface 2 a of the case 2. A lift button 3 (described later) having a trapezoidal shape in plan view is disposed at the front center of the upper surface 2 b of the case 2.

  Two support members 16 are provided on the bottom surface 2c of the case 2 on the front surface 2a side, and two support members 17 are provided on the back surface side 2c. The case 2 is supported at four points by these support members 16, 17, and a gap is formed between the base BS and the bottom surface 2 c of the case 2.

  Further, the projector 1 has an elevating member 12 to be described later at the front center of the inside of the case 2. If necessary, the case 2 is lifted and the elevating button 3 is pressed, so that the elevating member 12 can be raised and lowered by a mechanism to be described later, and the foot 12b can protrude from the bottom surface 2c of the case 2. If the case 2 is placed on the base BS again after the foot 12b protrudes, the case 2 is supported on the base BS by the two rear support members 17 and the foot 12b. The elevation angle of the projector 1 can be changed because the front surface 2a has a tilted posture in which the front surface 2a side is relatively high. The elevation angle of the projector 1 can be adjusted to an appropriate angle depending on the protruding amount of the foot 12b.

  Next, the lifting mechanism of the projector according to the present invention will be described in detail. FIG. 6 is a side cross-sectional view showing a state where the lifting / lowering operation of the lifting / lowering member is locked in the vicinity of the front center of the case of the projector according to the invention. As shown in FIG. 2, the above-described lift button 3 is provided on the upper surface 2b of the case 2 of the projector 1 so as to be movable up and down by a predetermined vertical distance. The lift button 3 has a table-like operation portion 3 a that can protrude and retract from an opening 4 provided on the upper surface 2 b of the case 2, and a pedestal portion 3 b that projects outward from the lower edge of the operation portion 3 a is an upper surface 2 b of the case 2. Is moved up and down, with the position abutting on the uppermost position and the position abutting on the lowest defined rib 5 integrally formed inside the upper surface 2a of the case 2 as the lowermost position. On the bottom surface of the pedestal portion 3b of the lift button 3, a plate-like operating protrusion 3c extending in the left-right direction (the front-rear direction in FIG. 2) is integrally projected.

  Below the elevating button 3 inside the case 2, an L-shaped rotation member 6 having an action piece 6 a and an operation piece 6 b extending in directions orthogonal to each other is provided in the front-rear direction (see FIG. 2 in the left-right direction). The operating protrusion 3c of the lift button 3c is always in contact with the top end portion of the action piece 6a extending substantially horizontally rearward. The actuating piece 6b extending substantially vertically downward is urged rearward by a compressed compression spring 11 disposed between the lower end portion of the front surface and the front surface 2a of the case 2 (projecting portion 10 projecting from). ing. A tooth group 6c is provided on the back surface of the operating piece 6b in the vertical direction. On the upper surface 2a of the case 2, the action piece 6b of the turning member 6 is removed from the turning fulcrum 6d in order to restrict the movement of the turning member 6 in the direction of the turning axis (front and rear direction in FIG. 2). A rib (not shown) is provided so as to be positioned from the left and right at the position.

  Behind the operating piece of the lift button 3 is a guide rail 13 formed integrally with the bottom surface 2c of the case 2, and a lift member 12 is slidable up and down (movable up and down) by a prismatic leg portion 12a. It is arranged. The leg portion 12a is inserted into an opening 14 provided in the front portion of the bottom surface 2c of the case 2, and at the lower end, the leg portion 12a protrudes below the bottom surface 2c of the case 2 and comes into contact with the surface of the desk or floor. Is integrated. When the elevating member 12 is at the uppermost position, the foot portion 12 b fits into the bottom surface 2 c of the case 2 by fitting into a recess 15 formed like a countersink around the opening 14. On the front surface of the leg portion 12a, a group of teeth 12c arranged in the vertical direction is formed almost throughout. Part or all of the tooth group 12c meshes with the tooth group 6c in a state where the operation piece 6b of the rotating member 6 is urged rearward, and locks the lifting operation of the lifting member 12.

  Next, the operation of the lifting mechanism having the above configuration will be described. As shown in FIG. 2, when the operation portion 3 a of the lift button 3 is pressed downward, the operating projection 3 c acts on the action piece 6 a of the turning member 6 to push down the action piece 6 a, and the turning member 6 It rotates and the action piece 6b moves to the front. Thereby, as shown in FIG. 3, the meshing (locking) of the tooth groups 6c and 12c is released, and the elevating member 12 can be raised and lowered. When the lifting member 12 is lifted and lowered, and the amount of protrusion of the foot 12b is adjusted appropriately, and the force that has pressed the lifting button 3 is removed, the tooth groups 6c and 12c are engaged again, so the lifting member 12 is locked. The With the above operation, the elevation angle in the projection direction of the projector 1 can be adjusted while raising the front portion of the case 2 by a necessary height.

  According to the above-described embodiment, the mechanism that allows the elevating member 12 to be raised and lowered by pressing the elevating button 3 can be realized only by interposing one rotating member 6, and two components of the unlocking member 106 and the locking member 108. Compared to the conventional configuration (see FIG. 5) that requires a small number of parts, the number of parts is small and cost reduction is achieved. That is, the rotating member 6 serves as the functions of the conventional unlocking member 106 and the locking member 108, thereby simplifying the configuration and reducing the number of parts.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications. For example, a cushioning material may be provided on the bottom surface of the foot portion of the elevating member, or a round protrusion may be provided in a protruding manner. May be. In this way, even if the elevation angle of the projector is increased and the angle of the bottom surface of the foot is largely inclined from the surface of the base, the load on the foot due to the weight of the projector is reduced, and 3 The stability of the case supported at the point is improved. Moreover, in said embodiment, although the raising / lowering member is locked using the meshing | engagement of the tooth group provided in the rotation member and the raising / lowering member, it is not restricted to this, For example, a convex part is 1 in a rotation member. A plurality of recesses are provided in the vertical direction so that the protrusions can be fitted to the elevating member, and the protrusions can be fitted with any of the recesses, or the recesses of the elevating member can be replaced with the protrusions. May be engaged.

  The present invention can be used for a projector used by being placed on a desk or a floor surface.

These are perspective views showing the appearance of a projector to which the present invention is applied. These are sectional side views which show the state where the raising / lowering operation | movement of the raising / lowering member was locked in the case front vicinity vicinity of the projector of this invention. These are sectional side views which show the state which pushed the raising / lowering button and made the raising / lowering member freely raise / lower in the vicinity of the front center of the case of the projector of this invention. These are sectional side views which show the state where the raising / lowering operation | movement of the raising / lowering member was locked in the case front vicinity vicinity of the projector of the past. These are sectional side views which show the state which pushed the raising / lowering button in the vicinity of the center part of the case front part of the conventional projector, and made the raising / lowering member freely movable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector 2 Case 2a Case front surface 2b Case upper surface 2c Case bottom surface 3 Lift button 6 Rotating member 6a Acting piece 6b Actuating piece 11 Compression spring 12 Lifting member 12a Leg part 12b Foot part

Claims (6)

An elevating button having an operating protrusion protruding downward and provided on the upper surface of the case so as to be movable up and down by a predetermined vertical distance;
An action piece extending substantially horizontally rearward so that the operation protrusion contacts the top end of the upper surface, and an action piece extending substantially vertically downward and biased rearward by a compression spring disposed between the lower end of the front surface and the front surface of the case. And a rotation member that is rotatably supported in the front-rear direction inside the case, and a tooth group that is provided on the back surface of the working piece and arranged in the vertical direction.
A prismatic leg inserted through an opening provided at the front of the bottom of the case, a foot that is integrally formed at the lower end of the leg and can protrude downward from the bottom of the case, and a front of the leg A raising and lowering member provided side by side in a vertical direction and meshing with a tooth group of the rotating member, and arranged to be movable up and down behind the operating piece;
With
By depressing the up / down button, the operating projection of the up / down button pushes the action piece of the rotating member to rotate the rotating member, and the operating piece of the rotating member and the leg of the up / down member The projector is characterized in that the meshing of the tooth groups of the part is released and the elevating member is freely raised and lowered, and then the foot portion of the elevating member is projected. An elevating button having an operating protrusion protruding downward and provided on the upper surface of the case so as to be movable up and down by a predetermined vertical distance;
An action piece extending substantially horizontally rearward and contacting the operation protrusion, an action piece extending substantially vertically downward and biased rearward, and a tooth group provided side by side on the back surface of the action piece. A rotating member pivotally supported in the case so as to be rotatable in the front-rear direction;
A prismatic leg inserted through an opening provided at the front of the bottom of the case, a foot that is integrally formed at the lower end of the leg and can protrude downward from the bottom of the case, and a front of the leg A raising and lowering member provided side by side in a vertical direction and meshing with a tooth group of the rotating member, and arranged to be movable up and down behind the operating piece;
With
By depressing the up / down button, the operating projection of the up / down button pushes the action piece of the rotating member to rotate the rotating member, and the operating piece of the rotating member and the leg of the up / down member A lifting mechanism for a projector, wherein the meshing of the tooth groups of the part is released and the lifting member can be raised and lowered, and then the foot portion of the lifting member is projected.   The operating protrusion of the up / down button is brought into contact with the tip of the upper surface of the action piece of the rotating member.   The projector lifting mechanism according to claim 2 or 3, wherein a compression spring is disposed between a front lower end portion of the operating piece of the rotating member and a front surface of the case.   The projector lifting / lowering mechanism according to claim 2, wherein a rib for restricting movement of the rotating member in the rotation axis direction is provided on an upper surface of the case.   The projector lifting mechanism according to any one of claims 2 to 5, wherein the bottom of the case is recessed with a countersink for storing the feet of the lifting member.

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