CN109979416B

CN109979416B - Piano hinge structure

Info

Publication number: CN109979416B
Application number: CN201910399309.5A
Authority: CN
Inventors: 闫雨; 张晓艳
Original assignee: Weifang Engineering Vocational College
Current assignee: Weifang Engineering Vocational College
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2021-03-12
Anticipated expiration: 2039-05-14
Also published as: CN109979416A

Abstract

The invention relates to a piano hinge structure, which relates to the technical field of hinges, wherein a first fixed plate is fixedly arranged on a first hinge plate, a pin hole is formed in the first fixed plate, a first rotating shaft is fixedly arranged on a second hinge plate, a second rotating shaft is rotatably arranged at the end bearing of the first rotating shaft, the second rotating shaft is movably inserted in the pin hole, a first notch is formed in the second rotating shaft, a first sliding groove is formed in the first fixed plate, the first sliding groove is communicated with the pin hole to form a through groove, the second rotating shaft is slidably arranged in the through groove through the first notch, the second fixed plate is fixedly arranged on the second rotating shaft, a torsion spring is sleeved on the first rotating shaft, one column foot of the torsion spring is fixedly arranged on the second fixed plate, and the other column foot of the torsion spring is fixedly arranged on the second hinge plate; the rotating shaft of the cover plate can move forwards after the cover plate is rotated and opened, so that the cover plate can be inclined and leaned on the side plate, and the cover plate can be placed stably after being opened.

Description

Piano hinge structure

Technical Field

The invention relates to the technical field of hinges, in particular to a piano hinge structure.

Background

The hinge is a connecting hinge which can connect two objects and can enable the two objects to rotate relatively.

The structural components of the piano, such as a key cover plate, a sound chamber cover plate and the like, need to be connected by hinges, so that the piano can be opened and closed conveniently; for compact structure type piano, in order to reduce the volume of piano, the distance between its key apron and the sound chamber curb plate is less, and this makes the apron open the back, and it hugs closely the curb plate, closes because of the accident easily, and then injures the user, if open the apron back lean on the curb plate to one side, can effectively guarantee that the apron places stably, makes it can not empty easily and close.

Disclosure of Invention

The invention aims to provide a piano hinge structure with reasonable design and convenient use aiming at the defects and shortcomings of the prior art, wherein a rotating shaft of the piano hinge structure can move forwards after a cover plate is rotated and opened, so that the cover plate can be inclined and leaned against a side plate conveniently, and the stable placement of the cover plate after the cover plate is opened can be ensured.

In order to achieve the purpose, the invention adopts the technical scheme that: the musical instrument comprises a first hinge plate, a second hinge plate, a first rotating shaft and a second rotating shaft, wherein the first hinge plate is fixedly arranged on a musical instrument seat, the second hinge plate is fixedly arranged on a cover plate, the first hinge plate is fixedly provided with a first fixing plate, the first fixing plate is provided with a pin hole, the second hinge plate is fixedly provided with a first rotating shaft, an end head bearing of the first rotating shaft is rotatably provided with the second rotating shaft, the second rotating shaft is movably inserted in the pin hole, the second rotating shaft is provided with a first notch, the second rotating shaft is clamped on the first fixing plate through the first notch, the first fixing plate is provided with a first chute, the first chute is communicated with the pin hole to form a through groove, the second rotating shaft is slidably arranged in the through groove through the first notch, the second rotating shaft is fixedly provided with a second fixing plate, the first rotating shaft is sleeved with a torsional spring, a column foot of the torsional spring is fixedly arranged on the second fixing plate, the other column foot of the torsion spring is fixedly arranged on the second hinge plate.

Further, the side of going up of No. two hinge plates seted up No. two scarce grooves, the fixed spout No. two that is provided with on the lateral wall of No. two scarce grooves, No. two scarce inslot activities are provided with the axis of rotation No. three, and the both ends of No. three axis of rotation slide respectively and insert and establish in the spout No. two of left and right sides, the fixed hinge plate No. three that is provided with in No. three axis of rotation, the fixed limiting plate that is provided with on the preceding lateral wall of No. two scarce grooves, No. three hinge plate movable clamp establish between limiting plate and apron, wear to establish to be fixed with the thread bush on No. three hinge plates, place the board through the fixed board that is provided with of thread bush on No. three hinge plates, and place the board setting in the front.

Furthermore, No. two fixed threaded rods that are provided with in the axis of rotation, and the threaded rod setting is in the one end of keeping away from a axis of rotation, the threaded rod top spin is equipped with lock nut, lock nut activity is supported and is established on the lateral wall of a fixed plate.

Furthermore, a guide sleeve is fixedly arranged on the first fixing plate, a support rod is movably inserted in the guide sleeve, a spring is fixedly arranged at the lower end of the support rod, the other end of the spring is fixedly arranged at the bottom of the guide sleeve, and the upper end of the support rod is higher than the upper side edge of the first fixing plate.

Furthermore, No. two hinge plates on the fixed spout that is provided with No. three, and No. three spouts and No. two hinge plate contained angles set up, slide in the spout No. three and be provided with the kicking block, No. one hinge plate on the fixed brace table that is provided with, the kicking block sets up the top side at the brace table.

The working principle of the invention is as follows: the rotary cover plate is opened to form a 90-degree angle with the piano base, at the moment, a first notch on the second rotary shaft is parallel to the first sliding groove, the second rotary shaft can slide into the first sliding groove, and when the second rotary shaft slides into the first sliding groove, the second rotary shaft is fixed and cannot rotate; when the torsional spring is in under the unstressed state, No. two fixed plates and No. one hinge plate are 90, when No. two axis of rotation slip in spout internal stability, apron accessible torsional spring supports, at the rotation of minimalistic range angle, the maximum torque control of torsional spring is passed through to this minimalistic range angle, this minimalistic range angle is vertical orientation 10, slide to the round pin downthehole when No. two axis of rotation, No. two axis of rotation can free rotation, the torsional spring supports No. two fixed plates and No. one hinge plate this moment, No. one axis of rotation and No. two axis of rotation relatively fixed this moment, can rotate simultaneously.

After adopting the structure, the invention has the beneficial effects that:

1. the first fixing plate is provided with a first sliding groove communicated with the pin hole, the second rotating shaft inserted in the pin hole is provided with a first notch matched with the first sliding groove in the direction, and then the second rotating shaft can rotate to a fixed angle and then slide in the first sliding groove, so that the cover plate fixed on the second hinge plate can slide back and forth after being opened;

2. no. two axis of rotation top spins and is equipped with the axis of rotation for fixing No. two hinge plates to through the torsional spring with an axis of rotation and No. two axis of rotation relatively fixed, can make between an axis of rotation and No. two axis of rotation can the small-angle scope rotate, guarantee that the apron can rock in the small circle after opening, guarantee after No. two axis of rotation slip in a spout, the apron can slightly rotate, thereby protect No. two axis of rotation not destroyed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

Fig. 3 is a sectional view B-B in fig. 1.

Fig. 4 is a schematic structural view of a first fixing plate according to the present invention.

Fig. 5 is a schematic structural view of a second rotating shaft in the present invention.

FIG. 6 is a schematic structural view of a first hinge plate in the present invention.

Fig. 7 is a schematic structural view of the guide sleeve and the support rod of the present invention.

Description of reference numerals:

the musical instrument seat 1, the apron 2, No. one hinge board 3, No. two hinge boards 4, No. one fixed plate 5, the pinhole 6, No. one axis of rotation 7, No. two axis of rotation 8, No. one scarce groove 9, No. one spout 10, No. two fixed plates 11, the torsional spring 12, No. two scarce grooves 13, No. two spouts 14, No. three axis of rotation 15, No. three hinge boards 16, the limiting plate 17, the thread bush 18, place board 19, threaded rod 20, lock nut 21, uide bushing 22, bracing piece 23, spring 24, No. three spouts 25, kicking block 26, brace table 27.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

The components such as the piano base and the cover plate shown in the description of the drawings are only used for explaining the connecting structure of the hinge structure in the embodiment, and in the concrete production, the structural components of the piano body such as the piano base and the cover plate can be selected to be in proper sizes according to actual conditions, so that the normal use of the hinge structure is not influenced.

Referring to fig. 1-7, the present embodiment comprises a first hinge plate 3, a second hinge plate 4, a first rotating shaft 7, and a second rotating shaft 8, wherein the first hinge plate 3 is screwed on the piano base 1, the second hinge plate 4 is screwed on the cover plate 2, the first hinge plate 3 is integrally formed with a first fixing plate 5 by bending the side of the first hinge plate 3 to form the fixing plate 5, the first fixing plate 5 is provided with a pin hole 6, the second hinge plate 4 is welded with the first rotating shaft 7, the end bearing of the first rotating shaft 7 is rotatably provided with the second rotating shaft 8, the second rotating shaft 8 is movably inserted in the pin hole 6, the second rotating shaft 8 is provided with a first slot 9, the second rotating shaft 8 is clamped on the first fixing plate 5 through the first slot 9, the first fixing plate 5 is provided with a first chute 10, the first chute 10 and the pin hole 6 are provided with a through slot, no. two axis of rotation 8 slides through scarce groove 9 and sets up in lining up the inslot, welds No. two fixed plates 11 on No. two axis of rotation 8, and the cover is equipped with torsional spring 12 on No. one axis of rotation 7, and a toe cap of torsional spring 12 welds and establishes on No. two fixed plates 11, and another toe cap of torsional spring 12 welds and establishes on No. two hinge plates 4.

Furthermore, a second notch 13 is formed on the upper side edge of the second hinge plate 4, a second sliding groove 14 is welded on the side wall of the second notch 13, a third rotating shaft 15 is movably arranged in the second notch 13, two ends of the third rotating shaft 15 are respectively inserted into the second sliding grooves 14 on the left side and the right side in a sliding manner, a third hinge plate 16 is welded on the third rotating shaft 15, a limiting plate 17 is welded on the front side wall of the second notch 13, the third hinge plate 16 is movably clamped between the limiting plate 17 and the cover plate 2, a threaded sleeve 18 is fixedly arranged on the third hinge plate 16 in a penetrating manner, a placing plate 19 is fixedly arranged on the third hinge plate 16 through the threaded sleeve 18 and screws, the placing plate 19 is arranged on the front side of the second hinge plate 4, the third hinge plate 16 is upwards pulled to the limiting plate 17, at the moment, the third rotating shaft 15 can rotate to enable the third hinge plate 16 to be flat, and then the placing plate 19 can be flat, and then can place article on placing board 19, will place board 19 and rotate laminating apron 2, can insert No. three hinge plates 15 and fix between limiting plate 17 and No. two hinge plates 4.

Further, No. two axis of rotation 8 on weld and be equipped with threaded rod 20, and threaded rod 20 sets up the one end of keeping away from a axis of rotation 7, threaded rod 20 top spin is equipped with lock nut 21, lock nut 21 activity is supported and is established on the lateral wall of fixed plate 5, the lock nut 21 of screwing, can make No. two axis of rotation 8 be difficult for rotating, can slow down its rotation falling speed when closing apron 2, can prevent that apron 2 from dropping and pounding the middle key too fast.

Further, fixed plate 5 on weld and be equipped with uide bushing 22, uide bushing 22 internalization is inserted and is equipped with bracing piece 23, the lower extreme of bracing piece 23 is welded and is equipped with spring 24, the other end adhesive fixation of spring 24 is in the bottom of uide bushing 22, the upper end of bracing piece 23 is higher than the side setting of going up of fixed plate 5, when covering apron 2, bracing piece 23 withstands apron 2, can slow down its impulsive force when closing, can prevent that apron 2 from closing fast and pounding the key.

Further, No. two hinge plates 4 on weld and be equipped with No. three spout 25, and No. three spout 25 and No. two hinge plates 4 contained angles set up, slide in No. three spout 25 and be provided with kicking block 26, fixed being provided with brace table 27 on the hinge plate, kicking block 26 sets up in brace table 27's top side, and sliding kicking block 26 can support brace table 27 through kicking block 26 when apron 2 closes, can keep the distance of apron 2 and key.

The working principle of the specific embodiment is as follows: the rotating cover plate 2 is opened to form a 90-degree angle with the piano base 1, at the moment, the first notch 9 on the second rotating shaft 8 is parallel to the first sliding groove 10, the second rotating shaft 8 can slide into the first sliding groove 10, and when the second rotating shaft 8 slides into the first sliding groove 10, the second rotating shaft 8 is fixed and cannot rotate; when torsional spring 12 is in under the unstressed state, No. two fixed plates 11 and No. one hinge plate 3 are 90, when No. two axis of rotation 8 slips into No. one spout 10 internal fixation, 2 accessible torsional springs 12 of apron support, at the internal rotation of minirange angle, this minirange angle passes through torsional spring 12's maximum torque control, this minirange angle is 10 of vertical direction, slide to pinhole 6 in No. two axis of rotation 8, No. two axis of rotation 8 free rotation, torsional spring 12 supports No. two fixed plates 11 and No. one hinge plate 3 this moment, No. one axis of rotation 7 and No. two axis of rotation 8 relatively fixed this moment, can rotate simultaneously.

After adopting above-mentioned structure, this embodiment has the advantage:

1. the first fixing plate 5 is provided with a first sliding groove 10 communicated with the pin hole 6, the second rotating shaft 8 inserted in the pin hole 6 is provided with a first notch 9 matched with the first sliding groove 10 in the direction, and the second rotating shaft 8 can rotate to a fixed angle and then slide in the first sliding groove 10, so that the cover plate 2 fixed on the second hinge plate 4 can slide back and forth after being opened;

2. no. two 8 top spins of axis of rotation are equipped with an axis of rotation 7 for fixed No. two hinge plates 4 to through torsional spring 12 with an axis of rotation 7 and No. two 8 relatively fixed of axis of rotation, can make and can rotate by the small-angle scope between an axis of rotation 7 and No. two axis of rotation 8, guarantee that apron 2 opens the back and can rock by the small-range, guarantee after No. two 8 slips in a spout 10, apron 2 can slightly rotate, thereby protect No. two axis of rotation 8 not destroyed.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a piano hinge structure which characterized in that: the musical instrument comprises a first hinge plate (3), a second hinge plate (4), a first rotating shaft (7) and a second rotating shaft (8), wherein the first hinge plate (3) is fixedly arranged on a musical instrument seat (1), the second hinge plate (4) is fixedly arranged on a cover plate (2), a first fixed plate (5) is fixedly arranged on the first hinge plate (3), a pin hole (6) is formed in the first fixed plate (5), the first rotating shaft (7) is fixedly arranged on the second hinge plate (4), a second rotating shaft (8) is rotatably arranged on an end head bearing of the first rotating shaft (7), the second rotating shaft (8) is movably inserted in the pin hole (6), a first notch (9) is formed in the second rotating shaft (8), the second rotating shaft (8) is clamped on the first fixed plate (5) through the first notch (9), a first sliding groove (10) is formed in the first fixed plate (5), a first sliding groove (10) is communicated with a pin hole (6) to form a through groove, a second rotating shaft (8) is arranged in the through groove in a sliding mode through a first notch groove (9), a second fixing plate (11) is fixedly arranged on the second rotating shaft (8), a torsion spring (12) is sleeved on the first rotating shaft (7), one column foot of the torsion spring (12) is fixedly arranged on the second fixing plate (11), and the other column foot of the torsion spring (12) is fixedly arranged on a second hinge plate (4).

2. A piano hinge structure according to claim 1, wherein: no. two scarce grooves (13) have been seted up to the upside edge of No. two hinge plates (4), fixed No. two spout (14) of being provided with on the lateral wall of No. two scarce grooves (13), No. two scarce inslot (13) internalization is provided with No. three axis of rotation (15), and the both ends of No. three axis of rotation (15) slide respectively and insert and establish in No. two spouts (14) of the left and right sides, fixed No. three hinge plates (16) of being provided with on No. three axis of rotation (15), fixed limiting plate (17) of being provided with on the preceding lateral wall of No. two scarce grooves (13), No. three hinge plates (16) activity clamp is established between limiting plate (17) and apron (2), wear to be fixed with thread bush (18) on No. three hinge plates (16), fixed placing plate (19) of being provided with through thread bush (18) on No. three hinge plates (16), and placing plate (19) set up the front side of No. two hinge plates (4.

3. A piano hinge structure according to claim 1, wherein: no. two axis of rotation (8) on the fixed threaded rod (20) that is provided with, and threaded rod (20) set up the one end of keeping away from a axis of rotation (7), threaded rod (20) top spin is equipped with lock nut (21), lock nut (21) activity is supported and is established on the lateral wall of a fixed plate (5).

4. A piano hinge structure according to claim 1, wherein: a guide sleeve (22) is fixedly arranged on the first fixing plate (5), a support rod (23) is movably inserted in the guide sleeve (22), a spring (24) is fixedly arranged at the lower end of the support rod (23), the other end of the spring (24) is fixedly arranged at the bottom of the guide sleeve (22), and the upper end of the support rod (23) is higher than the upper side edge of the first fixing plate (5).

5. A piano hinge structure according to claim 1, wherein: no. two hinge plate (4) on fixed be provided with No. three spout (25), and No. three spout (25) and No. two hinge plate (4) contained angle setting, No. three spout (25) are slided and are provided with kicking block (26), No. one hinge plate (3) is gone up fixed and is provided with brace table (27), kicking block (26) set up the side of going up at brace table (27).

6. A piano hinge structure according to claim 1, wherein: the working principle is as follows: the rotary cover plate (2) is opened to enable the rotary cover plate to be 90 degrees with the piano base (1), at the moment, a first notch (9) on the second rotary shaft (8) is parallel to the first sliding groove (10), the second rotary shaft (8) can slide into the first sliding groove (10), and when the second rotary shaft (8) slides into the first sliding groove (10), the second rotary shaft (8) is fixed and cannot rotate; when torsional spring (12) is in when not atress state, No. two fixed plates (11) are 90 with a hinge plate (3), when No. two axis of rotation (8) slide into spout (10) internal fixation time, apron (2) accessible torsional spring (12) support, at the rotation of small range angle, slide to pinhole (6) in No. two axis of rotation (8), No. two axis of rotation (8) can free rotation, torsional spring (12) supports No. two fixed plates (11) and No. two hinge plate (4) this moment, No. one axis of rotation (7) and No. two axis of rotation (8) relatively fixed this moment, can rotate simultaneously.