CN210865597U - Flat lid fender shell structure - Google Patents

Abstract

The utility model relates to the technical field of musical instruments, in particular to a flat-cover electric piano shell structure, a front cover plate is connected with an elastic pressure spring, the elastic pressure spring can apply a first acting force pointing to a rear cover plate to the front cover plate, and the bottom of the front cover plate is matched with a guide rail which is arranged in parallel with the elastic pressure spring; the bottom of the rear cover plate close to one side of the front cover plate is provided with a flip hinge and a pushing part; when the rear cover plate is rotated to be opened through the flip hinge, the pushing part can apply a second acting force to the front cover plate so that the front cover plate can overcome the first acting force and move along the guide rail. Compared with the prior art, the utility model, the modern design, the sound construction, the style is exquisite and easy operation, production simple to operate, with low costs, the practicality is strong, and the horizontal desktop can be amalgamated into to front shroud and back shroud, and the surface of desktop does not have the hinge to setting up through guide rail, slider and elasticity pressure spring makes whole flat cover turn over to close convenient, and the front shroud can be at the effect of elasticity pressure spring under automatic re-setting.

Description

Flat lid fender shell structure

Technical Field

The utility model relates to a musical instrument technical field is a flat lid fender shell structure particularly.

Background

An electric piano is a popular modern electronic musical instrument, and has various styles and varieties, and the requirements on the piano are different according to different application occasions. In the era of high-speed urbanization development, small, practical and compact flat-cover electric piano products are popular. The electric piano product has the advantages that the appearance is eliminated, the most main performance is sound and hand feeling, the feeling like a piano is realized by people as the name suggests, and the existing electric piano keyboard design is that keys press a balance weight lever arm to simulate the effect of a piano hammer to strike strings. Relatively speaking, the counterweight lever arm of the electric piano keyboard is too short, so that the hand feeling effect of a piano hammer in the stroke of striking the string is difficult to be fully reflected; and the lengthened keyboard counterweight lever arm tends to enlarge the keyboard, which is unfavorable for the structural design of the shell of the electric piano. If a keyboard with a slightly larger size is covered by one flat cover, the shell is easily damaged by turning the thick, heavy and wide flat cover, the hinge is loosened, the sight is easily blocked, and the appearance is poor. Therefore, two boards are generally spliced to form a flat cover for a slightly larger keyboard, and when the piano is played, the two boards or one board is unfolded and folded; the connection between the plates is generally realized by hinges, and the cover plate is generally thinner than 2 cm, so that the hidden hinges are not suitable for being assembled, and the structure of the hidden hinges is generally adopted, for example, Chinese patent publication No. CN201584154U discloses a flip cover device of a digital piano, which comprises a front key cover and a rear key cover, wherein the front key cover and the rear key cover are connected by a long hinge of the key cover, the long hinge of the key cover is a structure of the hidden hinges, and the arrangement of the structure of the hidden hinges is that a concave gap is arranged at the rotating shaft of the spliced flat cover hinge instead of the sharp rotating shaft exposed on the spliced flat cover, so that the upper surfaces of the two plates of the flat cover can not be spliced into a horizontal desktop, and the turning of the flat cover is inconvenient if the two plates of the prior art are spliced into the electric piano with the flat cover. Therefore, it is necessary to design a new type of case structure for a flat-covered electric piano.

Disclosure of Invention

An object of the utility model is to solve prior art's not enough, provide a flat lid fender shell structure, but front shroud and back shroud amalgamation one-tenth horizontal desktop, the surface of desktop does not have the hinge, and whole flat lid is turned over and is closed conveniently.

In order to achieve the purpose, the shell structure of the piano with the flat cover comprises a front cover plate and a rear cover plate which are sequentially arranged from front to back, wherein the front cover plate is connected with an elastic pressure spring, the elastic pressure spring can apply a first acting force pointing to the rear cover plate to the front cover plate, and the bottom of the front cover plate is matched with a guide rail which is arranged in parallel with the elastic pressure spring; the bottom of one side of the rear cover plate close to the front cover plate is provided with a flip hinge, and one side of the rear cover plate close to the front cover plate is also provided with a pushing part; when the rear cover plate is opened through the rotation of the flip hinge, the pushing part can be contacted with one side of the front cover plate close to the rear cover plate and applies a second acting force to the front cover plate so that the front cover plate can overcome the first acting force and move along the guide rail.

The utility model discloses still have following preferred technical scheme:

the bottom of the front cover plate is provided with a sliding block matched with the guide rail, and the front side of the sliding block is connected with the elastic pressure spring so as to provide a first acting force pointing to the rear side of the guide rail for the sliding block and the front cover plate.

The flat-cover electric piano shell structure further comprises keys and a key pressing plate covering the upper portion of the front side of the keys, the rear cover plate is connected to the upper portion of the rear side of the key pressing plate through a flip hinge and can shield the keys, and the upper portion of the key pressing plate is not covered by the portion, covered by the rear cover plate, of the rear cover plate and is provided with the guide rails along the longitudinal direction of the keys.

The flat-cover electric piano shell structure further comprises a bottom plate, a door baffle, a back plate and a left side plate and a right side plate, wherein a keyboard box body is formed between the left side plate, the right side plate, the door baffle, the bottom plate and the back plate, keys and a pressing key plate are arranged in the keyboard box body, a front cover plate is positioned above the back plate, two stress surfaces of an elastic pressure spring are respectively abutted against the back plate and a sliding block, and the rear side of a rear cover plate is also connected with a hanging baffle through a hanging baffle hinge and used for being matched with the door baffle to jointly block the keys.

At least two groups of guide rails, sliding blocks and elastic compression springs are arranged between the key pressing plate and the front cover plate, and a cushion block is arranged between the key pressing plate and the front cover plate.

The sliding block is provided with a concave notch for positioning the elastic pressure spring.

The flat-cover electric piano shell structure further comprises a circuit sound box, the circuit sound box is arranged on the lower side of the bottom plate, a rubber pad is arranged between the circuit sound box and the contact surface of the bottom plate, and a through hole is formed in the position, corresponding to the circuit sound box, of the bottom plate, so that the magnetic body of the loudspeaker can stretch into the keyboard box body through the through hole.

The back shroud contact with the front shroud through promotion portion, the back shroud be close to the contained angle between the wall of front shroud one side and the wall of back shroud upside for the obtuse angle, the front shroud be close to the contained angle between the wall of back shroud one side and the wall of front shroud upside for the acute angle.

And a round angle is arranged between the joint of the wall surface of the rear cover plate close to one side of the front cover plate and the wall surface of the upper side of the rear cover plate, and the position of the round angle is used as a pushing part of the rear cover plate.

The back shroud be close to the contained angle between the wall of front shroud one side and the wall of back shroud upside be 110 degrees, the front shroud be close to the contained angle between the wall of back shroud one side and the wall of front shroud upside and be less than 80 degrees.

Compared with the prior art, the utility model, composite structure is simple feasible, easily installs and dismantles, and its advantage lies in: the utility model has the advantages of novel design, the sound construction, the style is exquisite and easy operation, production simple to operate, and is with low costs, and the practicality is strong, but front shroud and back shroud amalgamation one-tenth horizontal desktop, the surface of desktop do not have the hinge to setting up through guide rail, slider and elasticity pressure spring makes whole flat cover turn over to close convenient, and the front shroud can be at automatic re-setting under the effect of elasticity pressure spring.

Drawings

Fig. 1 is a schematic side view illustrating the closing of the rear cover according to an embodiment of the present invention;

FIG. 2 is a schematic side view of the rear cover panel of the present invention shown in an opened position;

FIG. 3 is a schematic top view of the present invention without the front and rear cover plates;

FIG. 4 is a schematic front view of an embodiment of the present invention;

fig. 5 is a schematic diagram of a box body of the circuit sound box according to an embodiment of the present invention.

In the figure, 1, a front cover plate, 2, a sliding block, 3, a flip hinge, 4, a music score barrier strip, 5, a side plate, 6, a rear cover plate, 7, a black key, 8, a hanging baffle hinge, 9, a white key, 10, a hanging baffle, 11, a door baffle, 12, a bottom plate, 13, a support plate, 14, a pedal, 15, a pull-down plate, 16, a circuit sound box, 17, a rubber pad, 18, a keyboard frame, 19, a back plate, 20, a press key plate, 21, a function panel, 22, a guide rail, 23, an elastic pressure spring, 24, a screw and 25 are arranged.

Detailed Description

The structure and principle of such a device will be apparent to those skilled in the art from the following further description of the invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention has the advantages of innovative concept, practical and simple structure, small size and portability, is used as a piano and a table, and meets the personalized requirements. The front cover plate and the rear cover plate are spliced to be used as a flat cover of the electric piano, wherein the front cover plate 1 covers the front part of the keyboard and a back plate 19 of a piano shell, and the front cover plate 1 can move forwards and backwards smoothly; the back cover plate 6 covers the black and white key part and the door baffle 11 of the piano shell, the back cover plate 6 can be turned over and closed, the black and white keys can be covered when the back cover plate 6 is turned over, and the piano score plate can be used as the piano score plate when the back cover plate 6 is turned over; when the rear cover plate 6 is turned over, the front cover plate 1 is pushed to be smooth forwards, and the front cover plate 1 is subjected to elastic pressure; when the back cover plate 6 is closed, the elastic pressure is released, and the front cover plate 1 is pushed back backwards to be matched with the back cover plate 6 to form a horizontal table top.

Referring to fig. 1, the left and right side plates 5, the door shield 11, the bottom plate 12 and the back plate 19 form a keyboard box body, a keyboard is arranged in the keyboard box body, and the keyboard frame 18 and the keyboard box body are connected through screws; a key pressing plate 20 is arranged at the root parts of the black keys 7 and the white keys 9 of the keyboard, the key pressing plate 20 covers the part of the keyboard box body in front of the keys, the front end of the key pressing plate 20 is connected with a back plate 19 by screws 24, and the left side and the right side of the key pressing plate 20 are respectively connected with a left side plate 5 and a right side plate 5 by screws 24 and the like; a functional panel 21, a music score barrier strip 4 and a flip hinge 3 are arranged on one side of the key pressing plate 20 close to the keys; the other side of the flip hinge 3 is connected with the inner side of the rear cover plate 6, and the rear cover plate 6 can cover the keyboard, the black keys 7, the white keys 9 and the function panel 21 after being folded by the flip hinge 3; the other side of the inner side of the rear cover plate 6 is provided with a hanging baffle plate 10, the rear cover plate 6 and the hanging baffle plate 10 are connected through a hinge 8 of the hanging baffle plate 10, and when the rear cover plate 6 covers the keyboard, the hanging baffle plate 10 and the door baffle plate 11 jointly block the black keys 7 and the white keys 9 of the keyboard.

In fig. 1, a guide rail 22 is provided along the key longitudinal direction on the key plate 20 not covered by the rear cover 6, and a slider 2 capable of moving along the guide rail 22 is fitted on the guide rail 22, an elastic compression spring 23 is provided between the slider 2 and the rear plate 19 to abut against the slider 2 and the rear plate 19, a front cover 1 is provided on the upper portions of the slider 2 and the rear plate 19, the front cover 1 covers the rest of the keyboard box except the rear cover 6, and the slider 2 is coupled to the inner side of the front cover 1 by a screw 24.

Fig. 2 illustrates a state after the rear cover plate 6 is turned, and the front cover plate 1 receives a second acting force after being pushed by the pushing portion of the rear cover plate 6, and drives the sliding block 2 to move forward under the action of the second acting force, so as to compress the elastic compression spring 23 at the front end of the sliding block 2. When the rear cover plate 6 is closed, the second acting force of the rear cover plate 6 on the front cover plate 1 is cancelled, the elastic pressure spring 23 releases energy, the first acting force is applied to the slide block 2, the slide block 2 is pushed to retreat along the guide rail 22, the front cover plate 1 is driven to move backwards, and finally the front cover plate and the rear cover plate 6 are horizontally matched to cover the whole keyboard box body.

In the embodiment shown in fig. 3, considering that the standard keyboard is longer than 1.2 meters, in order to ensure smooth movement of the front cover plate 1, three groups of guide rails 22 and sliding blocks 2, namely a left group, a middle group and a right group, are arranged, and the front cover plate 1 is not easy to be manually turned over and damaged due to hooking of the guide rails 22; and for the longer gaps among the left, middle and right three groups of guide rails 22, two cushion blocks 25 are arranged, so that the front cover plate 1 can be prevented from being broken due to excessive load, and foreign matters can be prevented from rolling into the gap between the front cover plate 1 and the key pressing plate 20. In addition, in order to prevent the elastic compression spring 23 from dislocating, the slide block 2 and the guide rail 22 can also be provided with concave positioning notches for positioning the end part of the elastic compression spring 23; for the wood back plate 19, the elastic compression spring 23 can be directly nailed on the back plate 19 by using a pneumatic nailing gun, a concave positioning gap of the guide rail 22 is omitted, and if the elastic body is a spring steel sheet, the elastic compression spring can be directly fastened on the back plate 19 by using a punching screw 24.

In the embodiment, the rear cover plate 6 adopts three torque hinges as the flip hinge 3 to be connected on the key pressing plate 20 so as to reliably bear the torque load of the flip; for a standard keyboard longer than 1.2 meters, if two hinges are used, the bearing is difficult to meet, the hinges are easy to loosen from a turnover cover, and a plate with poor rigidity is raised and overturned difficultly. When the torque hinge is used as the flip hinge 3, the effect of stopping the angle at will is achieved, the individual requirements of different players on the placement of music scores can be met, the flip of the rear cover plate 6 is very convenient, the normal cover closing cannot generate impact, and the torque hinge is small and exquisite in style, simple and convenient to install. Certainly, the flip hinge 3 can also be an elastic descent hinge, or a common hinge combined with a key edge hydraulic descent control device, and the like, but the reliability is relatively poor, the installation is troublesome and time-consuming, and the cost and the appearance are not as good as those of a torque hinge.

In fig. 1, 2 and 3, the function panel 21 and the music score barrier 4 are arranged on the surface of the key-pressing plate 20, which is convenient for the player to use, and of course, other man-machine interaction components can be arranged on the surface of the key-pressing plate 20, or the function panel 21 is arranged on both sides of the keyboard, or a music score plate similar to a piano flip cover is arranged on the inner side of the back cover plate 6.

In order to make the rear cover plate 6 turn over freely and the front cover plate 1 smooth, in this embodiment, the included angle between the surface of the front cover plate 1 and the matching part of the rear cover plate 6 is set to be an acute angle smaller than 80 degrees, that is, the included angle between the wall surface of the front cover plate 1 close to one side of the rear cover plate 6 and the wall surface of the upper side of the front cover plate 1 is an acute angle smaller than 80 degrees, and the edge of the sliding block 2 is aligned and closely attached to the acute angle edge of the front cover plate 1, so as to avoid the discontinuity; the contained angle of 6 anastomotic portions of back shroud is established to about 110 degrees, and the contained angle that back shroud 6 was close to between the wall of front shroud 1 one side and the wall of 6 upsides of back shroud is about 11 degrees promptly, and back shroud 6 is close to and is equipped with the fillet between the junction between the wall of front shroud 1 one side and the wall of 6 upsides of back shroud, and the radius of fillet is about 0.5mm for when 6 upsets of back shroud, the contact of anastomotic portions is smooth. If the fillet is too large, a groove can be formed at the inosculating part. The relative angle of the inosculating part of the front cover plate 1 and the back cover plate 6 is determined by the maximum angle of the back cover plate 6.

In this embodiment, to reduce the volume of the electronic piano, the speaker and the main electroacoustic circuit are not included in the keyboard housing, but are independent from the outside of the keyboard housing. Fig. 1, 2 and 4 show a circuit sound box 16 similar to the pedal 14 box, which is inverted under the bottom plate 12, the contact surface between the circuit sound box 16 and the bottom plate 12 is adhered with a rubber pad 17 to enhance the sealing performance of the box, and the circuit sound box 16 is connected with the bottom plate 12 by screws 24. Of course, in other embodiments, the keyboard box may be widened, and the speaker and the main electroacoustic circuit may be directly mounted in the keyboard box, so that the front cover plate 1, the side plate 5, the bottom plate 12, the key pressing plate 20, and the guide rail 22 illustrated in the present embodiment are correspondingly enlarged, and the manufacturing is simpler, but the body becomes larger, and the floor space increases.

In fig. 5, two ends of the circuit sound box 16 are provided with corner connectors, seven small round holes in the figure are screws 24 for connecting in the mounting holes of the keyboard box bottom plate 12, the left and right oval through holes are oval speaker holes, and a partial section of the holes is a connector hole of the external interface of the circuit board. To reduce the height of the circuit sound box 16 and prevent the player from reaching the circuit sound box 16 with his knees, the 90 degree corner of the bottom rear of the circuit sound box 16 is chamfered into two 135 degree corners as shown in fig. 1, 2 and 4. In addition, in this embodiment, four elliptical through holes similar to those in the circuit sound box 16 are formed in the position of the bottom plate 12 corresponding to the circuit sound box 16, so that the magnetic body of the speaker extends into the bottom plate 12, which not only saves space, but also makes up for the deficiency of the resonance cavity of the circuit sound box 16, so that the keyboard box resonates together, and is beneficial to introducing a keyboard wire into the circuit sound box 16 to connect with a circuit board, thereby reducing the weight of the body. In other embodiments, the sound box may be made into a separate box body with better sealing performance, and the sound box may be arranged between the left and right supporting plates 13 instead of the pull-down plate 15 to form a stable supporting body with the box body of the pedal 14, so that the sound effect is more excellent, but the difficulty of manufacturing and installation is increased, and the weight of the body is also increased.

Claims (10)

1. The utility model provides a flat lid fender shell structure, includes by preceding front shroud and the back shroud that sets gradually after to, its characterized in that:

the front cover plate is connected with an elastic pressure spring, the elastic pressure spring can apply a first acting force pointing to the rear cover plate to the front cover plate, and the bottom of the front cover plate is matched with a guide rail arranged in parallel with the elastic pressure spring;

the bottom of one side of the rear cover plate close to the front cover plate is provided with a flip hinge, and one side of the rear cover plate close to the front cover plate is also provided with a pushing part;

when the rear cover plate is opened through the rotation of the flip hinge, the pushing part can be contacted with one side of the front cover plate close to the rear cover plate and applies a second acting force to the front cover plate so that the front cover plate can overcome the first acting force and move along the guide rail.

2. The piano cabinet structure of claim 1, wherein a slider for engaging with the guide rail is provided on the bottom of the front cover plate, and the front side of the slider is connected to the elastic pressing spring for providing a first force directed to the rear side of the guide rail to the slider and the front cover plate.

3. The piano cabinet structure of claim 2, further comprising keys and a key-depressing plate covering the upper front sides of the keys, wherein said rear cover plate is connected to the upper rear sides of the key-depressing plate by means of hinges for covering the keys, and the upper portions of the key-depressing plate, which are not covered by the rear cover plate, are provided with said guide rails in the longitudinal direction of the keys.

4. The piano shell structure of claim 3, further comprising a bottom plate, a door stop, a back plate, a left side plate and a right side plate, wherein a keyboard box is formed between the left side plate, the right side plate, the door stop, the bottom plate and the back plate, the keys and the key pressing plate are arranged in the keyboard box, the front cover plate is located above the back plate, two stress surfaces of the elastic pressure spring respectively abut against the back plate and the slider, and the rear side of the rear cover plate is further connected with a hanging stop through a hanging stop hinge for cooperating with the door stop to jointly block the keys.

5. The piano cabinet structure of claim 3 or 4, wherein at least two sets of said guide, slider and elastic compression spring are provided between said key-pressing plate and said front cover plate, and a spacer is further provided between said key-pressing plate and said front cover plate.

6. A piano cabinet structure of claim 2, 3 or 4, wherein said slide block is provided with concave notches for positioning said elastic compression springs.

7. The piano cabinet structure of claim 4, further comprising a circuit speaker, wherein the circuit speaker is disposed on the bottom side of the bottom plate, and a rubber pad is disposed between the circuit speaker and the contact surface of the bottom plate, and the bottom plate has a through hole corresponding to the position of the speaker of the circuit speaker, so that the magnetic body of the speaker can extend into the keyboard box through the through hole.

8. The piano cabinet structure of claim 1, wherein the rear cover is in contact with the front cover through the pushing portion, an angle between a wall surface of the rear cover on a side close to the front cover and a wall surface of the rear cover on an upper side of the rear cover is an obtuse angle, and an angle between a wall surface of the front cover on a side close to the rear cover and a wall surface of the front cover on an upper side of the front cover is an acute angle.

9. The piano cabinet structure of claim 8, wherein a round corner is formed at a junction between a wall surface of the rear cover plate near the front cover plate side and a wall surface of the rear cover plate upper side, and the round corner is located as a pushing portion of the rear cover plate.

10. The piano cabinet structure of claim 8, wherein the angle between the wall surface of the rear cover plate on the side close to the front cover plate and the wall surface of the rear cover plate on the upper side is 110 degrees, and the angle between the wall surface of the front cover plate on the side close to the rear cover plate and the wall surface of the front cover plate on the upper side is less than 80 degrees.

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