JP2008298917A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector having no operation part exposed to the outside and capable of improving degree of freedom in the design of the appearance and reducing the troublesome work for adjusting an elevation angle. <P>SOLUTION: An engaging claw part 31 of a slide member 3 is formed on a slope 31a having an upper face extended upward from a tip and a flat face 31b having a lower face being substantially horizontal from a tip. A screw part 121 of an elevating member 12 is formed on a flat face 121a being substantially horizontal from a tip on an upper face and a slope 121b having a lower face inclined downward from a tip. The slide member 3 is biased by a spring 6 and is engaged with the screw part 121 of the elevating member 12. When the elevating member 12 is first pulled downward to adjust an elevation angle roughly and is rotated, thereby finely controlling the elevation angle in this configuration of the projector. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

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

  FIG. 7 is a side sectional view showing a state in which the lifting / lowering operation of the lifting / lowering member is locked in the vicinity of the front center of the case 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. 7) 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. 7). 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 into 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. 7, 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 to move 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. 8, 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.

In Patent Documents 1 to 3, in the lifting mechanism of the projector, an operating member having an engaging portion that engages with the side surface of the lifting member is slidably provided, and the operating member is biased to the engaged state. When adjusting the elevation angle of the projector, it is described that the lifting member can be moved up and down by operating the operating member from the outside to release the engagement.
JP 2004-361603 A JP-A-9-54370 Utility Model Registration No. 3087182

  In the above-described configuration of the lift mechanism of the projector described above, there are problems that the lift button and the operation member are exposed to the outside, the appearance is poor, and the degree of freedom in external design is low. On the other hand, there is a mechanism in which the elevating mechanism is a screw system that does not require an elevating button or an operation member. However, the screw system has a problem that adjustment takes time and labor, and the operation becomes troublesome.

  The present invention has been made in view of the above-described conventional problems, and provides a projector that has no operation unit exposed to the outside, improves the degree of freedom in external design, and reduces the troublesome adjustment of the elevation angle. The purpose is to do.

  In order to achieve the above object, a projector according to claim 1 has a main body and an elevating mechanism provided on the bottom surface of the main body, and the elevation angle of the main body is adjusted by the elevating mechanism. The slide member is slidable in the horizontal direction inside, and has a slide member having an engaging claw portion at the tip, a biasing member that biases the slide member, and an opening provided in the bottom front portion of the main body. A columnar leg, a leg integrally formed at the lower end of the leg and projecting downward from the bottom of the main body, and a spiral provided on the outer periphery of the leg, and the engaging claw of the slide member And an elevating member disposed so as to be movable up and down and rotatable, and the upper surface of the engaging claw portion of the slide member is directed upward from the tip. Slope and bottom surface from flat to flat surface The screw part of the elevating member is formed on the upper surface on a substantially horizontal flat surface from the front end, and the lower surface is formed on a slope inclined downward from the front end, and when the elevation angle of the main body is greatly adjusted, the elevating member The engaging claw portion of the slide member moves over the screw portion of the elevating member and moves the engaging portion relatively upward so that the elevation angle of the main body is adjusted to a small width. When the elevating member is rotated, the engaging claw portion of the slide member is guided along the screw portion of the elevating member to move the engaging portion relatively upward or downward. It is characterized by letting.

  According to a second aspect of the present invention, in the projector according to the first aspect, a grip means is provided on the foot portion of the elevating member.

  The projector according to a third aspect of the present invention is the projector according to the second aspect, wherein the gripping means includes a disc portion provided on the foot portion of the elevating member, and a periphery of the disc portion. It is characterized by comprising a plurality of shallow vertical grooves engraved at intervals.

  According to the projector of claim 1, the elevation angle of the main body is roughly adjusted by pulling the lifting member downward, and then fine adjustment is performed by rotating the lifting member, so that the desired elevation angle can be quickly set. can do. Therefore, the troublesomeness of turning the screw all the way to the desired elevation angle is reduced. In addition, there is no such thing as an operation button exposed to the outside.

  According to the projector of the second aspect, since the grip portion is provided on the foot portion of the elevating member, the elevating member can be easily pulled out and rotated.

  According to the projector of the third aspect, the vertical groove provided around the disk portion serves as a slip stopper when the elevating member rotates, and the elevating member can be easily rotated.

  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 a front surface 2 a of a case (main body) 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 and 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. The foot 12b can be protruded from the bottom surface 2c of the case 2 by lifting the case 2 and pulling the lifting member 12 as necessary. 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 by rotating the elevating member 12 to finely adjust 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. 2 is a side sectional view showing a state where the projector is placed on the desk in the vicinity of the center of the lower front part of the case of the projector according to the present invention. As shown in FIG. 2, in the case 2, a slide member 3 is provided on the bottom surface 2c so as to be slidable in the horizontal direction. An engagement claw portion 31 is formed at the tip of the slide member 3. The engaging claw portion 31 is formed with a slope 31a whose upper surface is directed upward from the tip and a flat surface 31b whose bottom surface is substantially horizontal from the tip. The slide member 3 is urged rearward by a spring 6 disposed on the inner surface of the front wall of the case 2.

  Behind the slide member 3, an elevating member 12 is disposed in a guide tube 13 formed integrally with the bottom surface 2c of the case 2 so as to be movable up and down by a columnar leg portion 12a and to be rotatable. ing. The leg portion 12a is inserted through an opening 14 provided in the front portion of the bottom surface 2c of the case 2, and a disc-shaped foot portion 12b that protrudes below the bottom surface 2c of the case 2 and contacts the surface of the desk is integrated at the lower end. Have. On the outer periphery of the leg portion 12a, a screw portion 121 is integrally formed in a spiral shape. The screw part 121 is formed on a flat surface 121a that is substantially horizontal from the tip on the upper surface and an inclined surface 121b that the lower surface is inclined downward from the tip.

  A rectangular through-hole 13a is provided at the front lower end of the guide tube 13, and the slide member 3 is inserted into the guide tube 13 through the through-hole 13a. The engaging claw portion 31 of the slide member 3 is engaged with the screw portion 121 of the elevating member 12.

  In a state where the projector 1 is placed on the desk, the engaging claw portion 31 of the slide member 3 is engaged with the screw portion 121 of the elevating member 12, and the flat surfaces 31b of the engaging claw portion 31 and the screw portion 121 are arranged. 121a abuts and the upward movement of the elevating member 12 is restricted. Thereby, the front part of the case 2 is supported by the elevating member 12 protruding downward by a predetermined length, and the front of the projector 1 can be maintained in an inclined state.

  Next, the adjustment operation of the elevation angle of the projector provided with the lifting mechanism having the above configuration will be described.

  FIGS. 3 and 4 respectively show an operation of adjusting the elevation angle by a pulling operation of the elevating member and an operation of adjusting the elevation angle by a rotating operation of the elevating member in the vicinity of the lower front center of the case of the projector of the present invention. It is a sectional side view to explain.

  As shown in FIG. 3, when the foot 12b is gripped and the elevating member 12 is pulled downward, the screw portion 121 of the elevating member 12 and the inclined surfaces 121b, 31a of the engaging claw portion 31 of the slide member 3 come into contact with each other, The downward movement of the elevating member 12 is converted into the horizontal movement of the slide member 3, and the slide member 3 moves forward against the bias of the spring 6. As a result, the engagement claw portion 31 of the slide member 3 moves the engagement portion relatively upward so as to get over the screw portions 121 of the elevating member 12 one after another. As a result, it is possible to quickly project the foot 12b of the elevating member 12 downward from the case 2 by an approximate amount of projection corresponding to a desired elevation angle.

  Next, as shown in FIG. 4, when the elevating member 12 is rotated in a state where the foot portion 12 b is held, the engaging claw portion 31 of the slide member 3 is guided along the screw portion 121 of the elevating member 12. In this way, the engaging portion is moved relatively upward or downward. Thereby, it becomes possible to finely adjust the protruding amount of the foot 12b of the elevating member 12 until the projector 1 has a desired elevation angle.

  According to the above-described embodiment, the elevation angle is roughly adjusted by pulling the elevating member 12 downward, and then the elevating member 12 is rotated to perform fine adjustment, thereby quickly setting the desired elevation angle. Can do. Therefore, the troublesomeness of turning the screw all the way to the desired elevation angle is reduced. In addition, there is no such thing as an operation button exposed to the outside.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications. For example, in the above embodiment, the elevating member 12 screw portion 121 is formed as a spiral protrusion protruding outside the outer diameter of the leg portion 12a, but as shown in FIG. You may comprise as a groove | channel engraved helically on the outer periphery. Further, in order to facilitate the pulling and rotating operation of the elevating member 12, a gripping means may be provided on the foot 12b of the elevating member 12. As such a gripping means, for example, as shown in FIG. 6, a disc portion 122 is provided on the foot portion 12b, and a plurality of shallow vertical grooves 122a are formed at equal intervals around the disc portion 122. can do. According to this, the longitudinal groove 122a provided around the disk portion 122 serves as a slip stopper when the elevating member 12 rotates, and the elevating member 12 can be easily rotated.

  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 which put the projector on the desk in the case front lower vicinity vicinity of the projector of this invention. These are sectional side views explaining the operation | movement which adjusts an elevation angle largely by pulling-out operation of the raising / lowering member in the case front lower vicinity vicinity of the projector of this invention. These are sectional side views explaining the operation | movement which adjusts an elevation angle to a small width | variety by rotation operation of the raising / lowering member in the case front lower center vicinity of the projector of this invention. These are side views which show the modification of the raising / lowering member of this invention. These are side views which show the other modification of the raising / lowering member 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 2c Case bottom surface 3 Slide member 31 Engagement claw part 31a Slope 31b Flat surface 6 Spring 12 Lifting member 12a Leg part 12b Foot part 121 Screw part 121a Flat surface 121b Slope

Claims (3)

In a projector having a main body and an elevating mechanism provided on the bottom surface of the main body, and adjusting the elevation angle of the main body by the elevating mechanism,
A slide member provided in the main body so as to be slidable in a horizontal direction and having an engaging claw portion at a tip;
A biasing member for biasing the slide member;
A columnar leg portion inserted through an opening provided in a front portion of the bottom surface of the main body, a foot portion that is integrally formed at a lower end of the leg portion and can protrude below the bottom surface of the main body, and an outer periphery of the leg portion An elevating member that is provided in a spiral shape and has a threaded portion with which an engaging claw portion of the slide member is engaged, and is arranged to be movable up and down and rotatable.
With
The engaging claw part of the slide member is formed on a flat surface whose upper surface is inclined upward from the tip, and whose lower surface is substantially horizontal from the tip,
The screw portion of the elevating member is formed on the upper surface on a substantially horizontal flat surface from the tip, and on the inclined surface in which the lower surface is inclined downward from the tip,
When the elevation angle of the main body is to be adjusted significantly, the engaging portion is relatively moved by pulling the elevating member downward so that the engaging claw portion of the slide member gets over the screw portion of the elevating member. Move upward to
When adjusting the elevation angle of the main body to a small width, by rotating the lifting member, the engaging claw portion of the slide member is guided along the screw portion of the lifting member, A projector characterized by relatively moving upward or downward.   The projector according to claim 1, wherein gripping means is provided on the foot portion of the elevating member.   3. The gripping means includes a disc part provided on the foot part of the elevating member, and a plurality of shallow vertical grooves cut at equal intervals around the disc part. Projector.

Images