JP5229632B2 - Slide keyboard lid mechanism - Google Patents

Description

  The present invention relates to a slide keyboard lid mechanism for keyboard instruments such as an electronic piano and an electronic organ.

  In the present specification and claims, the side closer to the performer in the keyboard instrument and keyboard lid is described as the front side, and the far side is described as the rear side.

  As a slide lid that covers the keyboard of an electronic keyboard instrument, a slide lid that is composed entirely of a single plate or a configuration in which a large number of elongated plates are connected in the front-rear direction in an armored manner is often used. The former has a high-class feeling due to the integrated plate material, but requires a space for storing the keyboard cover in the depth direction when the cover is opened, and therefore the dimensions of the instrument body in the front-rear direction are increased. In the latter case, when the lid is opened, the keyboard lid can be bent and moved downward in the rear part of the instrument body, so that the longitudinal dimensions of the instrument body can be reduced. It tends to be lacking.

  On the other hand, the slide lid is divided into two parts, a front lid and a rear lid, to cover both the high-class feel of a keyboard instrument and the reduction of front and rear dimensions. A structure has been proposed in which the rear lid is guided so as to drop downward in the rear part of the musical instrument main body with the movement of. For example, the keyboard lid opening / closing mechanism disclosed in Patent Document 1 includes a front lid and a rear lid that are foldably connected with a hinge, and is provided on the front lid when the sliding lid is opened and closed. The pinion provided on the shaft portion and the rear lid is guided by a front lid guide member and a pinion guide rack provided on both sides of the musical instrument case, respectively. The rack descends in an arc shape toward the rear, and the lower end portion is formed substantially vertically. When opening the slide lid, the rear lid that moves rearward together with the front lid moves while being guided by the rack, and falls vertically at the rear of the instrument case. Therefore, in the opened state, the dimension in the front-rear direction of the bent slide cover is shortened, and based on this, the dimension in the front-rear direction of the instrument case can be reduced.

JP 2007-102045 A

  However, in the mechanism for guiding and dropping the rear lid to the rear part of the musical instrument case as shown in Patent Document 1, the dropping speed is accelerated by the weight of the rear lid, and when the keyboard lid is fully opened or approached. Will be a fairly fast speed. A stopper is provided to stop the operation, but a cushioning material is required to reduce the impact on the stopper.

  However, the shock-relieving cushioning material alone does not limit the acceleration when the rear lid drops, and there is a risk that fingers will be caught between the slide lid and the instrument case with increased movement speed. On the other hand, Patent Document 1 describes that a sudden drop of the rear lid is limited by a spring force in order to cope with this. The structure for this purpose is such that an arm that is braked for rotation by a coil spring is provided in a musical instrument case, and a rear lid is connected to the tip of the arm, which is a complicated structure that requires adjustment of the spring force. In addition, it is necessary to prevent the keyboard lid that receives the spring force from bouncing and making unnecessary movements, which also complicates the apparatus.

  The present invention solves such problems of the prior art, adopts a structure in which a part of the keyboard lid is dropped at the rear of the instrument body, and effectively slows down the opening operation without complicating the device. The object is to provide a slide lid mechanism.

In order to achieve the above object, the present invention can be opened and closed by a keyboard lid having a front lid 31 and a rear lid 32 that are foldably coupled by a coupling portion, and provided inside the side wall of the musical instrument case 10. A slide lid mechanism that supports the guide unit 50 to support opening and closing operations, and that guides the keyboard lid 30 to cover the keyboard portion when the lid is closed and to drop the rear lid 32 downward when the lid is opened. The part 50 includes a first guide part 51 provided on the side wall of the instrument case 10 and having at least one guide line extending in the front-rear direction, and a second guide part extending rearward from an intermediate position in the front-rear direction on the side wall of the instrument case 10. 52, and the keyboard lid 30 is provided at the front portion of the front lid 31 and guided to the first guide portion 51 by the front support portion 311; An intermediate support portion 312 provided on the front portion of the rear cover 32 and guided by the first guide portion 51, and a rear support portion provided on the rear portion of the rear lid 32 and guided by the second guide portion 52. 320, and the second guide portion 52 corresponds to the operation range of the open end of the keyboard lid 30 so that the portion that guides the rear support portion 320 falls as it goes backward. The first guide portion 51 has a portion that guides the front support portion 311 or the intermediate support portion 312 corresponding to at least a part of the guide range of the drop portion 523. The at least one raising part 515,516 inclined upward at a larger angle than the other part in the first guide part 51 as it goes to the at least one of the raising parts 515,516 is provided. The starting-point of the rise is to provide a sliding lid mechanism, characterized in that provided at positions corresponding to the lowered initial position of the drop unit 523.
[Action]

  In the slide lid mechanism according to claim 1, the guide portion that guides opening and closing of the keyboard lid includes a first guide portion and a second guide portion, and the first guide portion includes a front support portion and a front portion of the front lid. There is at least one guideline for guiding the lid or the intermediate support portion of the rear lid, and the second guide portion guides the rear support portion of the rear lid. And the 2nd guide part is made into the depression part which inclined so that the guidance site | part of a rear part support part might fall as it goes back corresponding to the operation | movement range of the open end part of a keyboard cover. Accordingly, when the lid is opened, the rear lid is guided to the depressed portion and moves downward in the rear portion of the musical instrument case.

  When the rear lid descends the sagging portion, if the rear lid alone is accelerated by its weight, the rear lid is connected to the front lid, and the first guide portion that guides the front lid is at least of the sagging portion. Corresponding to a part of the guide range, at least one ascending portion is provided at a portion for guiding the front support portion or the intermediate support portion. Therefore, the acceleration when the rear lid is lowered is offset or alleviated by the force required to raise the front lid at the ascending portion.

  In particular, at least one ascending portion is provided with an ascending start point at a position corresponding to the initial descent position of the sagging portion. Braking acts and the increase in the descending speed is effectively suppressed. As a result, when dropping the rear part of the keyboard lid, the lowering speed can be suppressed and the opening operation can be slowed without requiring a braking spring.

  According to a second aspect of the present invention, in the slide lid mechanism, the ascending portions 515 and 516 correspond to at least a part of the guide range of the depression portion 523 so that the front support in the first guide portion 51 is supported. The rising start point of at least one of the rising portions 515 and 516 is provided at a position corresponding to the initial lowering position of the dropping portion 523. Can be. As described above, the rising portion is provided in each guide portion of the front support portion and the intermediate support portion in the first guide portion, so that the acceleration of the rear lid when the rear support portion descends the drop portion is By the rise in the part support part and the intermediate support part, it is more effectively suppressed as compared with the case where the rise part is provided only in one of them.

  According to a third aspect of the present invention, the slide lid mechanism includes one of the rising portions 515 and 516 provided at the guide portions of the front support portion 311 and the intermediate support portion 312 in the first guide portion 51. The rising start points of the rising portions 515, 516 are provided at positions corresponding to the initial positions of the falling portions 523, and the positions of the other rising portions 515, 516 correspond to the positions moved from the rising start point to the rising side. A rising start point may be provided. As a result, when the rear support part starts to descend the depression part, the braking by the one raising part acts, and when the lowering advances, the braking by the other raising part is further applied and acts. An increase in the descent speed of the lid is further effectively suppressed.

  According to a fourth aspect of the present invention, in the slide lid mechanism, the sagging portion may be inclined at a constant angle at a portion on the descending side from the initial position of the descending. As a result, the force in the gravitational direction acting on the keyboard lid when the rear support portion moves through the portion becomes substantially constant, and the braking based on the ascending portion acts reliably.

  As described above, according to the present invention, a slide lid mechanism that adopts a structure in which a part of the keyboard lid is dropped into the rear part of the musical instrument main body and can effectively slow down the lid opening operation without complicating the device. Can be provided.

It is a vertical side view of the electronic keyboard musical instrument provided with the slide lid mechanism which concerns on one Embodiment of this invention. It is a perspective view which shows the principal part of the electronic keyboard musical instrument shown in FIG. 1 in a keyboard cover removal state. It is a bottom view of the keyboard cover used for the slide cover mechanism shown in FIG. FIG. 4 is a side view of the keyboard cover of FIG. 3. It is explanatory drawing of the functional part of the guide part in the electronic keyboard musical instrument shown in FIG. It is a figure which shows one step of the lid opening operation | movement in the electronic keyboard musical instrument shown in FIG. It is a figure which shows the next step of the lid opening operation | movement in the electronic keyboard musical instrument shown in FIG. It is a figure which shows the fully open state of the slide lid in the electronic keyboard musical instrument shown in FIG. It is a vertical side view of the electronic keyboard musical instrument provided with the slide lid mechanism which concerns on other embodiment of this invention. 10 (a), 10 (b), and 10 (c) are cross-sectional views centering on the guide portion by cross sections taken along the lines aa, bb, and cc in FIG. (d) is a perspective view showing a part of the support portion guided by the guide portion.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or similar parts in the drawings are denoted by the same reference numerals and description thereof is partially omitted.

  FIG. 1 is a longitudinal side view of an electronic keyboard instrument provided with a slide lid mechanism according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a main part of the slide lid mechanism with the keyboard lid removed.

  The electronic keyboard musical instrument includes a musical instrument main body 1 equipped with a keyboard device 20, a keyboard lid 30, a control unit 40 for controlling sound generation, a speaker (not shown) and the like in a musical instrument case 10, and a leg 2 for supporting the musical instrument main body. And. The musical instrument case 10 includes a pair of side plates 11, a lower shelf plate 12 extending between the side plates, an upper top plate 13, a front mouth bar 14, and a rear back plate 15, and a musical score on the top plate. The plate 16 is mounted so that it can be raised and lowered. The keyboard device 20 is rotatably provided with a white key 21 and a black key 22 supported on the shelf board 12, and emits control parameters according to the pressed / released key state. The control unit 40 processes the control parameters sent from the sound setting means 41 and the keyboard device 20 arranged on the panel behind the keyboard and generates a tone generation / control signal, and the speaker generates a tone based on this.

  3 and 4 show the keyboard cover 30, FIG. 3 is a bottom view, and FIG. 4 is a side view. The keyboard lid 30 is divided into a front lid 31 and a rear lid 32, and a hinge 33, which is a coupling portion, is provided on the back surface side, so that the keyboard lid 30 can be bent. A metal drooping plate 310 that covers the front of the keyboard when the lid is closed is fixed to the front end portion of the front lid 31. An upright plate 325 is fixed to the rear end portion of the rear lid 32 so as to extend upward when the lid is closed and cover the gap between the top plate 13 and the rear lid 32. The keyboard lid 30 is attached to the musical instrument case by a slide lid mechanism described below.

  The slide lid mechanism includes a keyboard lid 30 and a guide portion 50. The keyboard lid 30 is guided by the guide portion 50 to open and close, thereby covering the keyboard portion when the lid is closed and the rear lid 32 when the lid is opened. Moves so as to fall downward in the rear part. The guide portion 50 includes a first guide portion 51 provided on the instrument case side plate 11 and extending in the front-rear direction, and a second guide portion 52 extending rearward from an intermediate position in the front-rear direction on the instrument case side plate 11.

  In this embodiment, the first guide portion 51 is a piece that extends in the front-rear direction on the inner surface of the side plate 11 by fitting a long resin material having a square U-shaped cross section into a groove provided in the side plate 11. The groove-shaped guideline is formed.

  The second guide portion 52 includes a rack 520 having teeth on the upper surface, a mounting plate 521 fixed to the side surface of the rack, and a guide groove 525 formed on the side plate 11 so as to extend along the upper surface of the rack 520. The mounting plate 521 is fixed to the side plate 11 by screwing the mounting plate 521 to the side plate 11.

  As shown in FIGS. 3 and 4, the front lid 31 is provided with a front support portion 311 that protrudes laterally from the front end portion, and an intermediate support portion 312 that protrudes laterally from the rear end portion, A rear support part 320 is provided on the rear lid 32. The front support portion 311 is formed by pins fixed to both ends of the hanging plate 310 at the front end portion of the front lid 31, and the intermediate support portion 312 has a bracket 312 b on the lower surface of the rear end portion of the front lid 31. It is formed by the pin 312a attached via the pin.

  The rear support part 320 includes a bearing member 323 attached to both ends and a center part of the lower surface of the rear cover 32, and a shaft 321 that is rotatably supported by the bearing member 323 and extends along the longitudinal direction SS of the rear cover 32. And a pair of pinions 322 fixed to both ends of the shaft rod 321, and shaft ends 324 on both sides of the shaft rod 321 protrude outward from the pinion 322 and engage with guide grooves 525 of the second guide portion 52. Protruding parts are formed. Since the pair of pinions 322 are fixed to the shaft rod 321, they rotate at the same phase and do not cause twisting when the keyboard cover is moved.

  The guide portion 50 is set so that the keyboard lid 30 is opened and closed as shown in FIGS. 1 and 6 to 8. This will be described below with reference to FIG.

  The front portion of the rack 520 of the second guide portion 52 is a front-stage height retaining portion 522 that extends so as to gently descend from the front end to the rear. As the opening of the keyboard 30 progresses, the keyboard lid 30 reaches a position behind the position shown in FIG. Corresponding to this operating range, the second guide portion 52 is a drop portion 523 that is inclined in an arc shape so that the portion that guides the rear support portion 320 falls as it goes rearward.

  The depression 523 is desirably provided corresponding to the position of the open end of the keyboard lid 30 for the following reason. The descent of the rear part of the rear lid 32 by the descent part 525 starts from the early stage of the opening process of the keyboard lid, that is, the stage before the front end of the rear lid 32 retracts to the lower side of the front end of the top plate 13. As the player descends, the inside of the instrument main body 1 can be seen by the performer and the like, and the appearance is impaired. Therefore, it is desirable that the sagging portion 523 is provided corresponding to the moving process after the front end of the rear lid 32 reaches the lower side of the top plate 13. Considering the line of sight of the performer or the like from obliquely above, when the front end of the rear cover 32 reaches the lower side of the top plate 13, it moves further rearward by a distance equal to the gap between the rear cover 32 and the top plate 13. It is desirable to provide the depressed portion 523 corresponding to the subsequent movement process from the position.

  On the other hand, if the starting point of the sagging portion 523 is excessively rearward, the tilting of the sagging portion 523 becomes too steep, and the weight of the rear lid 32 increases the force of pulling the keyboard lid 30 downward, which tends to increase the descending speed. . The inclination angle of the sagging part is determined according to the size, weight, sagging distance, etc. of the rear lid in the front-rear direction. From these viewpoints, it is desirable that the starting point of the sagging part in the opening process is the opening end part of the keyboard cover 30 and the position where the inclination angle is not too steep.

  In this embodiment, the starting point of the sagging portion 523 is the opening end portion of the keyboard lid 30 and is a portion where the descending amount is larger than the backward moving amount, that is, the inclination angle of the second guide portion (second guide portion). The angle formed by the tangent line to the horizontal line is greater than 45 °.

  Further, as shown in FIG. 5, the slope of the sagging portion 523 is gradually steeper from the front height retaining portion 522 in the sacrificial front portion 523a, but is inclined at a constant angle in the rear sagging rear portion 523b. Yes.

  The first guide portion 51 extends from the upper end of the rising portion 510 that extends upward from the upper end of the mouth bar 14, and the height-holding portion that extends generally horizontally or rises slowly toward the rear extends. The rising part which raises with a stronger inclination is provided in two places. That is, the height holding portion is located at the upper end of the rising portion 510 and gradually rises backward, the first height holding portion 511, the substantially horizontal second height holding portion 512 located in the middle portion, and the substantially horizontal position located in the rear portion. And a third height retaining part 513. And the 1st raising part 515 is located between the 1st maintenance part 511 and the 2nd maintenance part 512, and the 2nd raising part 516 is between the 2nd maintenance part 512 and the 3rd maintenance part 513. positioned.

  The first rising portion 515 is provided at a position where the rising start point 515 a coincides with the starting point of the drop front portion 523 a of the drop portion 523. That is, the first rising portion 515 is configured such that the front support portion 311 is positioned at the starting point 515a of the first rising portion 515 when the rear support portion 320 (pinion 322) is positioned at the starting point of the front portion 523a. Is provided.

  The second rising portion 516 is provided at a position where the rising start point 516a coincides with the starting point of the falling back portion 523b of the falling portion 523. That is, the second ascending portion 516 is provided such that the intermediate support portion 312 is located at the starting point 516a of the second ascending portion 516 when the rear supporting portion 320 (pinion 322) is positioned at the starting point of the falling rear portion 523b. It has been. The inclination angle and length of the first ascending portion 515 and the second ascending portion 516 are determined in consideration of the braking action against the descending of the rear lid 32 and the avoidance of the collision between the front lid 31 and the top plate 13.

  The first guide portion 51 and the second guide portion 52 communicate with longitudinal grooves 111 and 112 extending downward from the upper surface of the side plate 11, respectively. When the musical instrument main body is assembled, the pins of the front support portion 311 and the intermediate support portion 312 pass through the vertical groove 111, and the shaft portion 324 of the rear support portion 320 passes through the vertical groove 112, respectively. To be introduced.

  Next, the operation of the slide lid mechanism according to this embodiment will be described. When the keyboard cover is opened from the closed state of FIG. 1, the position of each support portion relative to the guide portion 50 changes as follows with the progress of opening, and the guide portion performs a function necessary for each stage.

(1) State of FIGS. 1 to 6 in which the keyboard cover is in the initial to intermediate position of the opening / rear support portion 320: the front height holding portion 522 of the second guide portion 52
Front support portion 311: Standing portion 510 of first guide portion 51 to first height retaining portion 511
Intermediate support portion 312: first rising portion 515 to second height keeping portion 512 of the first guide portion 51
[Function of Guide Part] Since the rear support part 320 moves in the front stage height holding part 522, the rear cover 32 has a slight lowering amount and does not require braking, and each guide part guides the keyboard cover backward.

(2) State of FIG. 6 in which the keyboard lid is at the start point of the final stage of opening / rear support part 320: start point of the front part 523a of the second guide part 52, front support part 311: first rise of the first guide part 51 Starting point / intermediate support portion 312 of the portion 515: the second height retaining portion 512 of the first guide portion 51
[Function of Guide Part] The rear support part 320 reaches the starting point of the front part 523a (the depression part 523) and if there is no braking action, the lowering of the rear cover 32 is accelerated thereafter. However, since the front support portion 311 is located at the starting point of the first ascending portion 515 and starts to lift the front portion of the front lid 31, acceleration of the rear lid 32 is suppressed, and an increase in movement speed is mitigated.

(3) State in FIG. 7 where the keyboard cover is located in the latter half of the open end portion: rear support portion 320: start point of the rear portion 523b of the second guide portion 52, front support portion 311: second of the first guide portion 51 Hotaka 512
Intermediate support portion 312: Start point of the second ascending portion 516 of the first guide portion 51 [function of the guide portion] The rear support portion 320 falls and reaches the start point of the rear portion 523b, and the inclination angle of the guide becomes steeper. If there is no braking action, the lowering of the rear lid 32 is accelerated thereafter. However, the intermediate support portion 312 is positioned at the starting point of the second ascending portion 516 and starts to lift the rear portion of the front lid 31. Therefore, the acceleration of the rear lid 32 is suppressed by the elevation of the front lid 31, and the increase in moving speed is mitigated.

(4) When the keyboard cover is completely opened (state shown in FIG. 8)
-Rear support part 320: Lower end part of the drop part 523 of the second guide part 52-Front support part 311: Second height retaining part 512 of the first guide part 51
Intermediate support portion 312: Terminal end of the third height retaining portion 513 of the first guide portion 51 [Function of the guide portion] The intermediate support portion 312 contacts the terminal end of the third height retaining portion 513. Thereby, the front lid 31 and the rear lid 32 stop moving together with the front support portion 311 and the rear support portion 320 and are fully opened.

  According to this slide lid mechanism, when the lid is opened, the rear lid 32 is guided to the depression portion 523 and moved downward in the rear portion of the musical instrument case 10 as described above. When the rear lid 32 descends the falling portion 523, the front support portion 311 reaches the start point of the first ascending portion 515 in response to the rear support portion 320 reaching the start point of the drop front portion 523a. Then, the intermediate support portion 312 reaches the start point of the second ascending portion 516 in response to the rear support portion 320 falling and reaching the start point of the rear portion 523b, so that the lowering of the rear lid 32 is accelerated if there is no braking. At the timing, the rise of the front lid 31 performs a braking action, and an increase in the moving speed is effectively suppressed. As a result, it is possible to suppress the lowering speed of the rear cover 32 and slow down the moving speed when opening the keyboard cover 30 without complicating the device with a brake spring. This is an effect obtained by reducing the size of the musical instrument main body 1 in the front-rear direction by the depression 525.

  In order to obtain this effect, it is only necessary that the starting point of at least one of the two rising portions 515, 516 is provided at a position corresponding to the initial position of the falling portion 523, or It is only necessary that the rising start points of both rising portions correspond to the initial positions of the falling portions 523. In addition, when the force required for braking the lowering of the rear lid 32 is small, one ascending portion may be provided and provided for either the front support portion 311 or the intermediate support portion 312.

  When the keyboard cover 30 is closed, the reverse operation is performed. That is, in order to close the lid, it is necessary to move the keyboard lid 30 forward and pull up the rear lid 32, but the intermediate support portion 312 lowers the second ascending portion 516 while raising the rear support portion 320. Then, since the front support part 311 descends the first ascending part 515, the force required for pulling up is reduced each time. Therefore, less force is required to close the lid.

  In this embodiment, since the upright plate 325 is fixed to the rear end portion of the rear cover 32, the function of preventing an article such as a writing instrument placed on the keyboard cover 30 from falling into the instrument case is provided. Can be obtained. As shown in FIG. 1, the keyboard lid may have a concave connecting portion between the front lid 31 and the rear lid 32, and may be closer to the horizontal than the illustrated one. Therefore, articles such as pencils, pens, and erasers may be placed on the keyboard lid. If the keyboard lid is opened in this state, the article placed on the keyboard may move backward and fall from the tilted keyboard lid and fall into the instrument case. On the other hand, in this embodiment, since the upright plate 325 is fixed to the rear end portion of the rear lid 32, the article that has fallen to the rear end portion of the keyboard lid together with the open lid is received by the upright plate 325. Therefore, when the cover is closed, the article is returned with the closed keyboard cover while being held by the upright plate 325. Thereby, the fall into a musical instrument case is prevented.

  In the above embodiment, the intermediate support portion 312 is provided at the rear end portion of the front lid 31, but may be provided at the front end portion of the rear lid 32. Also in this case, since the rear end portion of the front lid 31 and the front end portion of the rear lid 32 are connected via the hinge 33 (connecting portion), substantially the same operation can be obtained. However, if the intermediate support portion 312 is provided behind the front end of the rear lid 32, the rear lid 32 rotates around the intermediate support portion 312 when the rear end portion of the rear lid 32 descends as the lid opens. Will move and its front end will rise. Depending on the rising amount, the front end of the rear lid 32 may collide with the top plate 13. Therefore, it is easier to avoid this collision if the intermediate support portion 312 is provided at the rear end portion of the front lid 31. Alternatively, the rotation axis of the hinge 33 may be protruded to the left and right of the keyboard lid and inserted into the groove of the first guide portion 51, and this protruding portion may be used as an intermediate support portion. In this case, the rotating shaft of the hinge has strength that functions as a guide support. In any case, the front support portion 311 and the intermediate support portion 312 can move more smoothly by inserting a roller rotatably on a shaft protruding from the front lid 31 or the rear lid 32.

  Moreover, in the said embodiment, the 1st guide part 51 for guiding the front part support part 311 and the intermediate | middle support part 312 was formed with one guideline. In this way, by configuring the first guide portion 51 with one guideline, the slide lid mechanism can have a simple structure, the required dimensions can be ensured and high durability can be obtained, etc. Application to a limited space in the instrument case is facilitated.

  However, the present invention is not limited to this, and it is also possible to separately provide guidelines for each support portion and to form the first guide portion 51 with a plurality of guidelines. In addition, it is possible to make some guidelines common and branch to a plurality of guidelines on the way. FIG. 9 shows an example of a slide lid mechanism including a first guide portion 51 composed of a plurality of guidelines. FIG. 10 is a cross-sectional view of the main part. (A), (b), and (c) are centered on the guide part in the cross section along the lines aa, bb, and cc in FIG. It shows.

  In this example, the front guideline 51a for the front support part 311 is formed by a wide shallow groove, and the rear guideline 51b for the intermediate support part 312 is formed by a narrow and deep groove. The parts extend on the same center line. Corresponding to these groove shapes, as shown in FIG. 10, the front support portion 311 has a large diameter and a short diameter, and the intermediate support portion 312 has a small diameter and a long length. As shown in FIG. 9, the front guide line 51a extends from the front end along the same line as the first guide part 51 of the embodiment shown in FIG. 1, and is slightly beyond the cc line in FIG. It's over. On the other hand, the rear guideline 51b extends from a position slightly ahead of the aa line in the front guideline 51a so as to overlap the front guideline 51a, and then reduces the amount of increase from the front guideline 51a at the position of the aa line. This extends to a position deviating from the front guideline 51a. Further, the rear guideline 51b extends again in the vicinity of the position of the line cc so as to overlap the front guideline 51a, and after the end of the front guideline 51a is exceeded, the rear guideline 51b alone and the first guide part 51 of FIG. It extends to the same position and reaches the end.

  The guidance of the keyboard cover 30 by the first guide portion 51 is performed as follows. When the keyboard cover 30 is closed, the same position as shown in FIG. 1 is taken, the front support portion 311 is located at the front end of the front guideline 51a (directly above the mouth bar 14), and the intermediate support portion 312 is located. Is located at the position indicated by the line bb in the rear guide line 51b. When the keyboard cover 30 is opened from this state, the front support part 311 and the intermediate support part 312 move backward, and the rear support part 320 performs the same movement as in the embodiment of FIG. At this time, the rear support part 320 is guided by the rear guideline 51b and gently rises to the position of the line cc without passing through the first rising part 515 of the front guideline 51a. In the embodiment of FIG. 1, a certain amount of force is required to raise the rear support portion 320 to the first ascending portion 515 in the initial stage of the opening operation, but this is not necessary in this embodiment.

  After the rear support part 320 reaches the depression part 523, the rear cover 32 is accelerated by the first raising part 515 of the front guideline 51a and the second raising part 516 of the rear guideline 51b, as in the embodiment of FIG. Is suppressed, and the increase in moving speed is mitigated.

Thus, by comprising the 1st guide part 51 by a some guideline, the operation | movement of the keyboard cover 30 can be set more finely and a smoother opening / closing operation | movement can be obtained. In addition, also in the location where the groove-shaped front guideline 51a and the rear guideline 51b intersect when viewed in the groove depth direction, the depth of each guideline and the front support part 311 and the rear support part inserted therein Since the length of 320 is different, the movement is not hindered by the groove wall at the intersection. However, as shown in FIG. 10 (d), the front support part 311 that moves the front guideline 51a having a shallow groove intersects with the rear guideline 51b by using an oval pin whose cross section is long in the moving direction _D51a. The location can be moved more smoothly.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible.

  For example, the second guide portion 52 and the rear support portion 320 may be configured as a grooved guide similar to the first guide portion 51 and a pin engaged with the same, instead of being configured by a rack and a pinion. In this case, synchronization operation between the left and right sides of the keyboard lid by the rack and pinion cannot be obtained, but it is possible to prevent the keyboard lid from swinging left and right during opening and closing by increasing the guidance accuracy of the opening and closing movement.

  In the above-described embodiment, the stop when the keyboard cover is fully opened is obtained by the intermediate support portion 312 coming into contact with the terminal end of the third height retaining portion 513. Instead, the rear support portion 320 is lowered. It can also be obtained by coming into contact with the end of the. Moreover, you may provide the stopper which contact | abuts or latches in any part of a keyboard cover for a stop.

1: musical instrument body, 10: musical instrument case, 11: side plate, 20: keyboard device, 30: keyboard lid, 31: front lid, 32: rear lid, 33: hinge (connecting portion), 50: guide portion, 51 first Guide part, 52 Second guide part, 51a: Front guideline, 51b: Rear guideline, 311: Front support part, 312: Intermediate support part, 320: Rear support part, 515: First lift part, 516 Second lift Part, 523: Depressed part

Claims (4)

A keyboard lid having a front lid and a rear lid that are foldably coupled by a coupling portion, and a guide portion that is provided inside the side wall of the musical instrument case and that supports the keyboard lid so that it can be opened and closed and guides the opening and closing operation. In the slide lid mechanism that sometimes guides the keyboard lid to cover the keyboard portion and to drop the rear lid downward at the rear when the lid is opened,
The guide part includes a first guide part provided on the instrument case side wall and having at least one guide line extending in the front-rear direction, and a second guide part extending rearward from an intermediate position in the front-rear direction on the instrument case side wall. Prepared,
The keyboard lid is provided at a front portion of the front lid and guided to the first guide portion, and a rear portion of the front lid or a front portion of the rear lid and the first guide portion. An intermediate support portion guided to the rear cover, and a rear support portion provided at the rear portion of the rear lid and guided to the second guide portion,
The second guide part corresponds to the operating range of the open end of the keyboard lid, and the part that guides the rear support part is a sagging part that is inclined so as to fall backward,
The first guide portion corresponds to at least a part of the guide range of the sagging portion, and the portion that guides the front support portion or the intermediate support portion moves to the other portion of the first guide portion as it goes rearward. At least one ascending portion that is inclined upward at a larger angle,
At least one of the ascending parts is provided with a starting point of ascending at a position corresponding to an initial descent position of the sagging part.   The ascending portion is provided in each guide portion of the front support portion and the intermediate support portion in the first guide portion corresponding to at least a part of the guide range of the depression portion, and at least of the ascending portion The slide lid mechanism according to claim 1, wherein a rising start point in one of the rising portions is provided at a position corresponding to an initial lowering position of the dropping portion.   The rising start point of one rising portion of the rising portions provided at the guide portions of the front support portion and the intermediate support portion in the first guide portion is a position corresponding to the initial position of the falling portion. The slide lid mechanism according to claim 2, wherein a lift start point of the other lift portion is provided corresponding to a position that is provided and moves from the lift start point to the lift side.   The slide lid mechanism according to any one of claims 1 to 3, wherein the sagging portion is inclined at a constant angle in a portion on the descending side from the initial position of the descending.

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