JP2005116953A - Lid opening/closing mechanism and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid opening/closing mechanism which serves quality upgrading, use expansion, and cost reduction. <P>SOLUTION: A first axis 8 and a second axis 9, arranged on the lid side, respectively fit a first circular arc groove 20 and a second circular arc groove 21, which are arranged on the main body side and serve as guide grooves, and rotate guided by the first circular groove 20 and the second circular grooves 21 by sliding. By receiving energization or energized resistance from an energization means 5 arranged between the main body side and the lid side, the lid can be switched from a close state in which the first axis 8 is positioned at one end 20a of the first circular arc groove 20 while the second axis 9 is positioned at the other end 21b of the second circular arc groove 21, to the open state in which the second axis 9 moves to the one end of the second circular arc groove 21 by sliding with the first axis 8 as the fulcrum after the first axis 8 moves to the other end of the first circular arc groove 20 by sliding with the second axis 9 as the fulcrum, and also the lid is held energized in the close state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lid opening / closing mechanism for rotating and opening a lid with respect to a corresponding portion of a box-shaped main body and an apparatus therefor.

  The rotary lid opening / closing mechanism normally switches the lid between a closed state and an open state by pivotally supporting the lid with a corresponding part of the box-shaped main body. In this case, with the single-axis configuration, the rotation trajectory of the lid is uniquely determined, and the gap set between the main body and the main body is relatively large so that the lid does not interfere during the rotation process. FIG. 12 shows a conventional example in which such a problem is alleviated by a biaxial configuration.

  FIG. 12A shows the closed state of the lid, and FIG. 12B shows the opened state. Reference numeral 60 denotes a box-shaped main body, and reference numeral 61 denotes a lid that opens and closes the operation surface 60 a of the main body 60. The lid opening / closing device includes a first bearing portion 62 with an arc-shaped bearing surface 62a provided on the main body 60 side, an arc-shaped guide groove (hole) 63 concentric with the bearing surface 62a, and the lid 61 side. The first shaft 64 provided on the second shaft 65 and the second shaft 65 slidably fitted in the guide groove 63 and the main body 60 and the lid 61 are provided to urge the lid 61 in the opening direction. And a locking means (latch device) 68 that is provided on the main body 60 and engages / disengages with the engaging projection 67 on the lid 61 side. When the lid 61 is in the closed state, the first shaft 64 abuts against the bearing surface 62a of the first bearing portion 62 and is held by the lock means 68. Is turned in the opening direction. In this case, in the initial stage of the opening operation, the first shaft 64 acts as a rotation shaft, and the second shaft 65 slides from one end (lower end) to the other end (upper end) of the guide groove 63. After reaching the other end of the guide groove 63, the second shaft 65 acts as a rotation shaft of the lid 61 in the subsequent opening operation. In the above lid opening / closing device, the trajectory (the trajectory corresponding to the guide groove 63) when the lid 61 is rotated about the first shaft 64 and the second end abutting on the other end (upper end) of the guide groove 63 are provided. Since it moves along the trajectory when it is rotated with the shaft as a fulcrum, the lid trajectory can be arbitrarily set from the single-axis configuration, and the gap S between the lid 61 and the main body 60 can be reduced. There is.

Japanese Patent Laid-Open No. 6-53671

As described above, in the conventional lid opening and closing device, the biasing means such as the spring 66 that biases the lid 61 in the opening direction, and the lock means 68 that locks the lid against the biasing of the biasing means, Is provided. The biasing means prevents the ratchet of the lid 61 by the biasing force in the open state and the action of improving the operability by switching the lid 61 from the closed state to the open state automatically or semi-automatically by the biasing force. Also serves as an action. The lock means 68 holds the lid 61 against the urging force of the urging means in the closed state. Such an apparatus still has problems from the following viewpoints.
(A) In the conventional apparatus, since the biasing means biases the lid exclusively in the opening direction, a lock means for holding the lid against the biasing force in the closed state is essential. This locking means engages and disengages the engagement protrusions provided on the back or back of the lid with the locking mechanism on the main body side, which not only increases costs but also exposes the components when the lid is open. It may be a factor that impairs the appearance or impairs the operability of the main device.
(A) In the conventional apparatus, the lid is convenient to be switched from the closed state to the open state by the biasing force of the biasing means, but at the time of switching from the open state to the closed state, the lid is operated with an operation force proportional to the biasing force. Must be rotated. In this case, when the biasing force is set to a weak eye, the biasing means can perform the lid closing operation with a small force, but cannot automatically rotate the lid in the opening direction. Conversely, if the biasing force is set to a large value, the lid can be automatically rotated in the opening direction, but it is difficult to close the lid. In other words, since the conventional urging means urges the lid in one direction, in addition to the above-described problems, the lid opening / closing operability is standardized, and further operability improvement and higher quality are achieved. It was difficult.
(C) In order to improve the opening and closing operation of the lid, a braking damper is also used in the conventional device. However, in the case where the rotation trajectory of the lid is complicated by the above-described two-axis configuration, even if the damper is employed, it is impossible or complicated to apply the braking force in the entire process of opening and closing the lid.
An object of the present invention is to realize quality improvement, application expansion, and cost reduction by solving the above problems relatively easily.

According to the first aspect of the present invention, the lid-side shaft is slidably fitted in the guide groove on the box-shaped main body side, and the lid is placed in a closed state and an open state with respect to the corresponding portion of the main body. In a lid opening / closing mechanism that is switched to rotate with sliding, the guide groove has a first arc groove and a second arc groove that are provided on the main body side and maintain a gap, and the shaft is provided on the lid side. A biasing means having a first shaft guided by the first arcuate groove and a second shaft guided by the second arcuate groove, wherein the lid is provided between the body side and the lid side From the closed state in which the first shaft is positioned on one end side of the first arc groove and the second shaft is positioned on the other end side of the second arc groove by receiving the biasing or biasing resistance of After the first shaft slides substantially toward the other end of the first arc groove with the second shaft as a fulcrum, the second shaft has the first shaft as a fulcrum. Slides to one end of the arcuate groove with a switchable to an open state, is characterized by biased held in the closed state.
The invention of claim 2 captures the above-mentioned lid opening / closing mechanism from the device structure, and is fitted in the guide groove provided on the box-shaped body side and slidably fitted in the guide groove provided on the lid side. A lid opening / closing apparatus that switches the lid between a closed state and an open state with respect to a corresponding portion of the main body with sliding of the shaft, the guide groove provided on the main body side A first wall having a first arc groove and a second arc groove that are spaced apart from each other, and a first shaft and a second arc groove that are provided on the lid side and guided as the shaft to the first arc groove. An arm having a second axis to be guided; and provided between the standing wall side and the arm side, wherein the lid positions the first axis on one end side of the first arcuate groove, and the second From the closed state in which the shaft is positioned on the other end side of the second arc groove, the first shaft has the second shaft as a fulcrum. After substantially sliding to the other end side of one arcuate groove, the second shaft is slid to one end side of the second arcuate groove with the first axis as a fulcrum and switched to the open state, And urging means for urging and holding the lid in the closed state.
In each invention, the main body means a housing or a case of a device or apparatus. A lid has the same meaning as a door or cover. Each axis is used to include a convex portion, a pin, and the like that are slidably fitted to the corresponding first arc groove and second arc groove on the main body side.

Compared with the two-axis configuration of FIG. 12, the above lid opening / closing mechanism and device are such that the guide groove is composed of two independent arc grooves, and the lid is switched from closed to open or from open to closed. When switching, one of the first shaft and the second shaft has a movement that slides with the other as a fulcrum and a movement with the other that slides with one as a fulcrum, and the biasing means opens the lid in the open state. In addition to being held so as not to rattle, it is different in that it is biased and held even in the closed state. Then, the lid is pivotally switched between a closed state and an open state in accordance with the trajectories of the first arc groove and the second arc groove, and is pivoted against the biasing force of the biasing means at the initial stage of each switching. Moreover, it will become a more preferable form when the following structures are employ | adopted.
The structure of claim 3 includes a braking means for braking the rotational switching speed of the lid provided between the frame and the arm while the arm is assembled to the standing wall together with the urging means. ing. In this form, for example, the main body side standing wall is configured as a frame or the like as in the embodiment, so that it becomes a unit product, and the braking means is pre-assembled together with the urging means so as to be easy to handle and assemble to the main body. Can be improved.
The structure of claim 4 is characterized in that the braking means is a damper attached to the arm and having a rotary gear, and the rotation means is provided in a process in which the lid is switched from a closed state to an open state by being provided at different locations on the standing wall. The gear is composed of a plurality of teeth that mesh in a switching manner from one to the other. In this configuration, in a biaxial configuration, a braking force can be obtained in almost the entire process of opening and closing by a plurality of tooth configuration with a simple lid.
The structure of claim 5 is such that when the main body has a relief groove for escaping the arm on the front bottom wall side and is pivotally supported by the standing wall, the lid is switched from the closed state to the open state. A cover member is provided to stand and make the escape groove invisible from the front. In this embodiment, when the lid is moved largely backward along the bottom side of the corresponding portion of the main body to be in the open state as in the embodiment, a relief groove for releasing the arm on the lid side is usually provided on the main body side. Although the appearance is worse, the escape groove is made invisible by a simple cover member.

The lid opening / closing mechanism and apparatus of the present invention can have the following advantages.
In claims 1 and 2, since the lid is held in the closed state by the urging means, the lock means for holding the lid in the closed state as in the prior art can be eliminated. Thereby, the cost corresponding to the locking means can be reduced, the assembling property can be simplified and the appearance characteristics can be improved. Further, the lid opening / closing operation is operated against the urging force of the urging means only in the initial stage, but thereafter, the operability can be maintained because the lid is rotated by the urging force. Further, the rotation trajectory of the lid can be set in a wide range by changing the trajectories of the first arc groove and the second arc groove.
In claims 3 and 4, the lid opening / closing speed can be made almost constant by the braking means to give a high-class feeling. In this case, the braking means is conventionally employed, but the braking action can be imparted in almost the entire process when the lid is opened and closed even in the biaxial configuration.
-Claim 5 WHEREIN: Even when it moves a cover largely to the corresponding part bottom side of a main body and makes it an open state, an external appearance fall factor can be prevented by a cover member, and an external appearance characteristic can be maintained.

  The best mode of the present invention will be described with reference to embodiments of the drawings. FIG. 1 shows an example of an apparatus that employs a lid opening / closing device (hereinafter abbreviated as “device”) of the invention, wherein (a) is a closed state of the lid, (b) is an open state of the lid, and (c). FIG. 2 is a schematic external view in an open state. 2 is a block diagram showing the relationship between the left side device of FIG. 1 and the main body, and FIG. 3 is a block diagram showing the relationship between the right side device of FIG. 1 and the main body. 4 to 5 show the operation of the device of the present invention by the left side device of FIG. 2, and FIG. 6 shows the right side device of FIG. FIG. 7 is a configuration diagram showing the relationship between the main members of the device as an example of the left side device. 8 and 9 are single views of the frame (standing wall) and arm of the left side device, and FIGS. 10 and 11 are single views of the frame (standing wall) and arm of the right side device. 8 to 11, each (a) is a top view, each (b) is a side view, and each (c) is a cross-sectional view taken along line AA, BB, etc. shown in (b). . In the following description, after giving an overview of the whole, the essential parts will be clarified by examples.

(Outline) The apparatus of FIG. 1 is a liquid crystal projector in which a main body 10 has an opening 11a on a front surface 11 and a projection lens is projected and retracted from the opening 11a. The idea is to provide a rotating lid 15 instead of a configuration in which a cap is attached to and detached from the opening 11a for the purpose of improving appearance characteristics and ease of use. 11 can be opened and closed. 1 to 3, the main body 10 is partitioned into a box shape by a front surface 11 and a rear surface, both side surfaces 12, and upper and lower surfaces 13 and 14. The front surface 11 is provided with an opening 11a. The left side surface 12 is provided with a heat radiating portion 12a composed of a number of holes. The lower surface 14 is provided with a plurality of leg members 14a for high adjustment, escape grooves 14b on both sides opening the front bottom wall portion, mounting portions 14c to 14e standing up corresponding to the respective escape grooves 14b, and the like. Yes. The escape groove 14b and the attachment portions 14c to 14e are provided in pairs on both sides. Each escape groove 14 b is formed from the lower wall portion of the front surface 11 to the front bottom wall portion of the lower surface 14. The left and right invention devices 1 are attached to the attachment portions 14c to 14e on both sides. The lid 15 has a horizontally long rectangular plate shape corresponding to the front surface 11 of the main body. The lid 15 has, on the back or back side, mounting protrusions 15a provided on both lower sides substantially corresponding to the relief grooves 14b on both sides, and a finger hanging recess 15b provided on one inner surface side. Have.

  Each device 1 is in a state in which the lid 15 is in a closed state with respect to the opening, the operation surface, or the front surface 11 of the main body 10 in a state in which the lid 15 is slidably fitted to the corresponding guide grooves with two shafts. The rotation is switched to an open state (which means a fully open state). A structural feature is that the frame 2 on the main body 10 side as the guide groove has a first arc groove 20 and a second arc groove 21 that are provided at intervals in the vertical direction. The lid 15 is provided with the frame 2 in that the arm 3 has a first shaft 8 fitted in the first arcuate groove 20 and a second shaft 9 fitted in the second arcuate groove 21. By receiving the biasing or biasing resistance of the spring member 5 provided between the arm 15 and the arm 15, the first shaft 8 is positioned on one end side of the first arc groove 20, and the second shaft 9 is positioned on the second arc groove 21. After the first shaft 8 is substantially slid to the other end side of the first arc groove 20 with the second shaft 9 as a fulcrum from the closed state located on the other end side, the second shaft 9 supports the first shaft 8 as a fulcrum. The second arc groove 21 is slid to one end side so that it can be switched to the open state, and is biased and held when the lid 15 is closed. When the device 1 of the invention is regarded as a lid opening / closing mechanism, the frame 2 can be integrally formed on the main body 10 as a standing wall, or the arm 3 can be integrally formed on the lid 15 as an arm shape.

  The apparatus 1 according to the embodiment includes a frame 2 in which a main member is fixed to the main body 10 side, an arm 3 coupled to a lid 15, and is pivoted on the frame 2 to be raised or tilted in conjunction with the movement of the arm 3. Cover member 4, spring member 5 provided between frame 2 and arm 3, and braking damper 6, which are unitized. The material of the frame 2, the arm 3, and the cover member 4 is a resin molded product, but other materials may be used. Further, the frame 2 and the arm 3 are arranged on the left side (FIGS. 2, 4, 5, 7 to 9) 1 disposed on the left side of FIG. The apparatus 1 (FIGS. 3, 6, 10, and 11) 1 is slightly different in shape, but the operation is the same. This is because, for example, the frame 2 and the arm 3 of the left side device 1 do not impair the inflow and outflow of air from the heat radiating portion 12 a of the main body side surface 12. In the following description, the apparatus 1 on the left side will be mainly described.

  As shown in FIGS. 7 and 8, the frame 2 has a substantially flat plate shape, and the first arc groove 20 and the second arc groove 21 provided in the main portion and the arc-shaped tooth portions 23a and 23b. A mounting piece 24 provided on the front side, a regulating piece 25 and a mounting shaft 26 for the cover member, mounting pieces 27 and 28 provided on both rear sides, and a rear side wall portion projecting the mounting piece 28 It has a latching portion 29 for the spring member provided. Reference numerals 22 a to 22 c are air through holes provided in the main portion and penetrating left and right. The through holes 22a to 22c are omitted on the right frame 2 and the corresponding portions are formed as recesses. On the contrary, the right frame 2 has a protruding piece 22d protruding to the upper piece side of the main part, but the protruding piece 22d is omitted from the left frame 2. The attachment pieces 27 and 28 have attachment holes, positioning holes, and the like, and are formed as locations and shapes corresponding to the attachment portions 14c to 14e on the main body lower surface 14 side as described above.

  Here, the first arc groove 20 and the second arc groove 21 are positioned one above the other and extend in the front-rear direction. The groove rear side is one end 20a, 21a and the groove front side is the other end 20b, 21b ( 8 and FIG. 9), the other ends 20b, 20b of each groove are separated from each other by a larger distance than the gap between the one ends 20a, 21a. The trajectory is, for example, an arc in which the first arc groove 20 is centered on the other end 21b of the second arc groove 21, and the second arc groove 21 is centered on the other end 20b of the first arc groove 20. Arc.

  The tooth portions 23a and 23b are positioned one above the other and are provided in the front and rear middle from the front side. The tooth portion 23a is provided with an arc-shaped rib between a substantially middle rib bordering the first arc groove 20 and the front side of the main portion, and a predetermined number of teeth are continuously formed on the rib. The tooth portion 23b is provided with an arc-shaped rib between a substantially middle rib bordering the second arc groove 21 and the front side of the main portion, and a predetermined number of teeth are continuously formed on the rib. The tooth portions 23a and 23b are formed as tooth portions 23c and 23d on the right frame 2 (see FIG. 10). That is, the tooth parts 23a, 23b and the tooth parts 23c, 23d are provided on substantially the same arc ribs of the left and right frames 2, but the number of teeth between the upper tooth parts 23a, 23c and the lower tooth parts 23b, The number of teeth of 23d is different. In this example, the upper tooth portion 23a has more teeth than the corresponding tooth portion 23c, and the lower tooth portion 23b has fewer teeth than the corresponding tooth portion 23d. As will be described later, this is because the rotating gear 7 of the damper 6 attached to the arm 3 side has teeth of any one of the tooth portions 23a to 23d in all the processes in which the lid 15 is rotated and switched between the closed state and the open state. This is to make them mesh with each other.

  The cover member 4 is assembled to the frame 2 with respect to the front mounting shaft 26. As can be inferred from FIGS. 2, 3, and 4 (b), the cover member 4 includes a plate-like support portion 40, a cover portion 41 provided on one end side of the support portion 40, and a cover portion 41. The small stopper piece 42 protruded to the tip end side of the support portion 40 approaching the boss portion and the boss portion 43 protruded to the base end piece side of the support portion 40 are integrally provided. The cover member 4 is assembled to the frame 2 by fitting the boss portion 43 to the mounting shaft 26 so that the boss portion 43 can be rotated and prevented from coming off. At that time, the coil spring 7 is incorporated in a state of being held on the outer periphery of the boss portion 43. That is, the coil spring 7 has a spring winding portion at the intermediate portion, and with the spring winding portion held by the boss portion 43, one end is locked to the vertical rib on the frame 2 side and the other end is the support portion 40. It is hung on the corresponding part of the.

  On the other hand, as shown in FIGS. 7, 9, and 11, the arm 3 has a substantially flat plate shape, and has a large plate width portion 30 that overlaps the main portion of the frame 2, and the front side of the portion 30. It is comprised with the connection part 31 which protrudes. The portion 30 has a disposition hole 33 penetrating left and right at a substantially central portion, two engaging portions 34 cut out in the radial direction from the disposition hole 33, and a first arc groove 20 fitted into the first arc groove 20. An upper boss portion 35 that holds the shaft 8, a lower boss portion 36 that holds the second shaft 9 fitted in the second arcuate groove 35, and a locking portion 37 that protrudes to the upper side. Is provided. Each boss portion 35, 36 is formed with a small diameter mounting hole 35a, 36a on the back side in the cylinder. Reference numerals 32 a to 32 c are air through holes provided in the portion 30 and penetrating left and right. The through holes 32a to 32c are omitted on the right arm 3, and the corresponding portions are formed as recesses. The connecting portion 33 is provided with an insertion hole 33a that is concave from the front end surface toward the portion 30, and an attachment hole 33b that penetrates the insertion hole 33a from the lower surface.

  The damper 6 is attached to the arrangement hole 33 and the locking portion 34. The damper 6 is, for example, a known hydraulic type having a rotating gear 7 and is configured such that the rotating gear 7 rotates under the resistance of hydraulic oil in the main body. In this example, the damper 6 has two elastic locking pieces attached around the main body. And the damper 6 is mounted | worn by aligning each said elastic locking piece with the corresponding locking part 34 with respect to the arm 3, and pushing it into the arrangement | positioning hole 33 from the state. In the mounted state, the main body of the damper 6 is positioned in the arrangement hole 33, and the rotating gear 7 protrudes outward from the corresponding one side surface of the arm 3.

  The above-described arm 3 is arranged so as to be in the form shown in FIG. 7 with respect to the frame 2 with the damper 6 attached, and is assembled via the first shaft 8 and the second shaft 9 and is attached by the spring member 5 of FIG. Be linked. The first shaft 8 and the second shaft 9 have a flanged cylindrical shape, and are engaged with the corresponding boss portions 35 and 36 on the frame side from the first arc groove 20 and the second arc groove 21 corresponding to the cylinder portion. Is done. That is, in this operation, the arm 3 is arranged so that the boss portions 35 and 36 are overlapped on the corresponding first arc groove 20 and the second arc groove 21 from one side of the frame 2, and the first shaft 8 and the second shaft 9 is engaged from the other side of the frame 2 into the corresponding boss 35 or 36 from the inside of the first arc groove 20 or the second arc groove 21, and each screw 38 is connected to the first shaft 8 or the second axis 38. It passes through the inside of the shaft 9 and is locked in the small-diameter mounting holes 35a, 36a. The apparatus 1 according to the embodiment becomes a unit product by the spring member 5 being stretched between the arm 3 and the frame 2 after the arm 3 is assembled to the frame 2. As shown in FIG. 2 and the like, the spring member 5 is a wound spring, and one end is latched on the frame side latching portion 29 and the other end is latched on the arm side latching portion 37.

(Example of Attachment to Equipment) The above apparatus 1 is commercially available or handled as a unit product, the frame 2 is attached to the main body 10, and the arm 3 is connected to the lid 15. In this case, in the frame 2, the mounting piece 24 and the mounting pieces 27 and 28 are positioned and arranged on the corresponding mounting portions 14c to 14e on the lower surface 14 of the main body, and fixed at a plurality of positions by screws 18 or the like (see FIGS. 2 and 3). ). The arm 3 is connected to the lid 15 by a screw 19 or the like inserted from the mounting hole 33b after engaging the lid-side protrusion 15a with the insertion hole 33a of the connecting portion 31. Of course, this attachment structure may be other than this, and is appropriately designed according to the shape of the main body 10 and the lid 15 of the device.

(Operation) Next, the operation of the device 1 or the lid opening / closing mechanism will be clarified with reference to FIGS. 1 and 4 to 6. 4 to 6, the damper 6 and the rotating gear 7 are indicated by imaginary lines in order to make the relationship between the teeth 23a to 23d on the frame side serving as braking means and the damper 6 easier to understand. Further, in FIG. 5, the lid is omitted from the drawing space restriction.

(1), FIG. 4 (a) shows the lid 15 in a closed state. In this closed state, the arm 3 has a lower portion positioned in the escape groove 14b of the main body 10, the first shaft 8 is positioned at one end 20a of the first arc groove 20, and the second shaft 9 is in the second arc. It is located at the other end 21 b of the groove 21. The lid 15 is held in a state in which the front surface 11 of the main body 15 is covered by the urging force of the spring member 5. On the other hand, FIG. 4B shows an open (fully open) state of the lid 15. In this open state, the arm 3 has largely entered the escape groove 14 b at the lower side, the first shaft 8 is positioned at the other end 20 b of the first arc groove 20, and the second shaft 9 is the second arc groove 21. It is located at one end 21a. Further, the lid 15 is moved to the lower side of the main body 15 by the urging of the spring member 5 and is held in a state where the forward projecting portion is reduced. Therefore, in this device 1 or the lid opening / closing mechanism, the biasing means that acts when the lid 15 is opened / closed can be adopted, and the conventional locking means can be eliminated to reduce the cost and maintain the appearance characteristics well.

(2) FIGS. 5A and 5B show a state in which the lid 15 is being opened and closed while being rotated by a predetermined angle in the opening direction from the closed state. In FIG. 5A, the lid 15 is turned in the opening direction against the bias of the spring member 5 from the closed state, and the first shaft 8 has one end 20a of the first arcuate groove 20 with the second shaft 9 as a fulcrum. It is a mode when it slides from the other end 20b side. In this aspect, the spring member 5 is extended to the maximum to increase the urging force. And the lid | cover 15 is automatically rotated from the closed state of FIG.5 (b) to the closed state of FIG.4 (b) by the spring member 5 which carried out the spring charge of the urging | biasing force from this aspect. That is, the operator releases his / her hand from the lid 15 (the edge, the recess 15b, etc.) in the manner shown in FIG. Then, the lid 15 slides from the other end 21b of the second arcuate groove 21 to the one end 21a side with the first shaft 8 having the second shaft 9 moved to the other end 20b as a fulcrum, and further, as shown in FIG. To reach the open state. The lid 15 is switched from the open state to the closed state by the reverse operation described above. That is, the operator rotates the cover 15 against the bias of the spring member 5 from the closed state to the middle of opening and closing of FIG. Then, the lid 15 is switched to the closed state by the urging of the spring member 5. Thus, in the device 1 or the lid opening / closing mechanism, the lid 15 is operated against the bias of the spring member 5 only in the initial stage of switching the lid 15 from the closed state to the open state, and from the open state to the closed state. Since each rotation is automatically switched, the switching operability can be equal to or better than that of the conventional apparatus.

(3) In this device 1, the rotation gear 7 of the arm-side damper 6 is provided at a plurality of locations on the frame side in the entire process in which the lid 15 is rotated and switched between closing and opening as described above. It is always braked by meshing with any of the teeth 23a to 23d. This is realized by the following configuration. In the first configuration, for example, the rotating gear 7 meshes with the lower tooth portion 23b (23d) in the lid closed state of FIG. 4A, and then the lid is opened and closed in FIGS. 5A and 5B. Further, the rotating gear 7 meshes with the upper tooth portion 23a (23c) in the lid open state of FIG. 4B, so that the rotating gear 7 is engaged with the upper tooth portion 23a (23c) and the lower tooth portion 23b (23d). ) In a switching manner. In the second configuration, by changing the number of teeth of the upper and lower teeth 23a and 23b on the left frame 2 side and the upper and lower teeth 23c and 23d on the right frame side, for example, rotation of the damper 6 on the left frame 2 side When the gear 7 switches from the lower tooth portion 23b of FIG. 4 (a) to the upper tooth portion 23a of FIG. 5 (a), the gear 7 rotates idly. During the idling, the rotating gear 7 of the damper 6 on the right frame 2 side is rotated. This is to maintain the meshing with one of the upper and lower tooth portions 23c, 23d. Therefore, even when the device 1 or the lid opening / closing mechanism adopts a two-axis configuration and complicates the rotation locus of the lid 15, a braking force is applied in the entire rotation process, thereby improving the quality.

(4) In this device 1, as shown in FIG. 4B and FIG. 5, the cover member 4 automatically rotates when the lid 15 is switched from the closed state to the open state, and the cover portion 41 is moved to the main body 1. Standing on the front side of the relief groove 14b. That is, the cover member 4 is rotated downward with the mounting shaft 26 as a fulcrum by the bias of the coil spring 17 as the arm 3 rotates in the lid opening direction, and the stopper piece 42 comes into contact with the regulating piece 25. In this way, it is kept in a usage state, that is, in an upright state. Further, as the arm 3 rotates in the lid closing direction, the cover part 41 is rotated upward while the cover 41 is pushed up by the arm 3 against the bias of the coil spring 17, and the cover member 4 is lifted from the escape groove 14 b. It is accommodated in the main body 10 while increasing the inclination. Therefore, in this apparatus 1, even if the escape groove 14b is provided in order to move the pivot locus of the arm 3 from the front side of the main body 10 to the rear side of the lower surface, the front side of the escape groove 14b is covered with the cover 15 open. Since it is shielded by the cover portion 41 of the member 4, the appearance characteristics can be maintained.

  As described above, the present invention realizes simplification of constituent members as compared with the conventional two-axis configuration, can improve the rotation switching characteristics of the lid 15, and can be widely applied to various devices and apparatuses. Can be expected.

It is a schematic explanatory drawing which shows the example of an apparatus which employ | adopted the lid | cover opening / closing apparatus of invention. It is a block diagram which shows the relationship between the left side invention apparatus of FIG. 1, and an apparatus side main body. It is a block diagram which shows the relationship between the right side invention apparatus of FIG. 1, and an apparatus side main body. It is a figure of the closed and open state which shows the action | operation of the said apparatus with the left side apparatus. It is a figure which shows an apparatus operation | movement in the process in which the cover of FIG. 4 is switched from closed to open. It is a figure which shows the action | operation of the said apparatus by the right side apparatus corresponding to FIG.5 (b). It is a block diagram which shows the relationship between the flame | frame and arm of the said apparatus with the left side apparatus. It is a block diagram which shows the flame | frame of the left side apparatus as said apparatus. It is a block diagram which shows the arm of the left side apparatus as said apparatus. It is a block diagram which shows the flame | frame of the right side apparatus as said apparatus. It is a block diagram which shows the arm of the right side apparatus as said apparatus. It is explanatory drawing which shows the prior art example of a lid | cover opening / closing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lid opening and closing device 2 ... Frame (standing wall, 20 is 1st circular groove, 21 is 2nd circular groove)
3 ... arm (30 is a part, 31 is a connecting part, 33 is a damper arrangement part)
4 ... Cover member 5 ... Spring member (biasing means)
6 ... Damper (braking means, 7 is rotating gear)
8 ... 1st axis 9 ... 2nd axis 10 ... Main body (11 is front surface, 14 is lower surface, 14a is escape groove)
15 ... Lid 23a-23d ... Tooth part (braking means)

Claims (5)

A lid-side shaft is slidably fitted in a guide groove on the box-shaped main body side, and the lid is rotated with sliding of the shaft in a closed state and an open state with respect to a corresponding portion of the main body. In the lid opening / closing mechanism to switch,
The guide groove has a first arc groove and a second arc groove which are provided on the main body side and maintain a distance, and the shaft is provided on the lid side and is guided by the first arc groove. A shaft and a second shaft guided by the second arc groove,
The first shaft is positioned at one end of the first arcuate groove by receiving a biasing force or a biasing resistance of a biasing means provided between the main body side and the lid side, From the closed state in which the two shafts are positioned on the other end side of the second arc groove, the first shaft substantially slides toward the other end side of the first arc groove using the second shaft as a fulcrum. A lid opening / closing mechanism characterized in that the shaft is slidable toward one end side of the second arcuate groove with the first shaft as a fulcrum and can be switched to an open state, and is biased and held in the closed state. A guide groove provided on the box-shaped main body side; and a shaft provided on the lid side and slidably fitted in the guide groove, wherein the lid is closed and opened with respect to a corresponding portion of the main body. In the lid opening and closing device that switches the rotation with sliding of the shaft,
A standing wall having a first arc groove and a second arc groove which are provided on the main body side and keep an interval as the guide groove;
An arm provided on the lid side and having a first axis guided by the first arc groove as the axis and a second axis guided by the second arc groove;
Provided between the standing wall side and the arm side, the lid has the first shaft located on one end side of the first arcuate groove, and the second shaft placed on the other end side of the second arcuate groove. After the first closed state, the first shaft substantially slides toward the other end of the first arc groove with the second shaft as a fulcrum, and then the second shaft has the first axis as a fulcrum and the second arc. A lid opening / closing apparatus comprising: an urging means that slides toward one end side of the groove so as to be switched to an open state, and urges and holds the lid in the closed state.   The said arm is assembled | attached with the said urging means with respect to the said standing wall, and it has a braking means provided between the said frame and an arm and brakes the rotation switching speed of the said lid | cover. Lid opening / closing device.   The braking means includes a damper having a rotating gear attached to the arm, and a rotating gear provided from one side to the other in a process in which the lid is switched from a closed state to an open state provided at different locations on the standing wall. The lid opening / closing device according to claim 2 or 3, comprising a plurality of tooth portions meshing in a switching manner. The main body has a clearance groove for allowing the arm to escape on the front bottom wall side, and is pivotally supported by the vertical wall to stand up when the lid is switched from the closed state to the open state. The lid opening / closing device according to any one of claims 2 to 4, further comprising a cover member that makes the viewing more invisible.

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