CN206975999U - A kind of buffer device for keyboard cover of piano - Google Patents

Abstract

The utility model discloses a kind of buffer device for keyboard cover of piano, the buffer unit includes being arranged at the first descending lifeline of piano left plate and is arranged at the second descending lifeline of piano right plate, and each descending lifeline includes a circular cylinder body, bottom plate and cover plate, is fixed on the mandrel on bottom plate, the torsion spring being sheathed on the mandrel, the rotating shaft for being coaxially disposed and being rotatably connected with push rod and the clamp clip for being connected with piano keyhoard cover respectively；The torsion spring of first descending lifeline and the torsion spring of the second descending lifeline it is oppositely oriented.Buffer unit structure provided by the utility model is simple, manufacturing cost is low, and ensure that both ends stress balance during piano lid decline, ensure that the frequent folding of piano lid is not susceptible to deform.

Description

A kind of buffer device for keyboard cover of piano

Technical field

Piano manufacturing technology field is the utility model is related to, more particularly to a kind of buffer device for keyboard cover of piano.

Background technology

Existing buffer for cover on piano keyboard uses gas spring or rotary damper, and wherein gas spring physical dimension is larger And unsightly, and rotary damper structure is small can be achieved to be built on piano side plate, but because cost is of a relatively high, piano life A rotary damper is generally only installed on piano side plate by production factory when being assembled, and installs a bearing pin in relative side Auxiliary support effect is played to cover of keyboard, so as to realize the slow drop of cover of keyboard, but due to the unbalance stress at cover of keyboard both ends, with Usage time growth, the problems such as deformation occurs in cover of keyboard.

It can be seen that prior art could be improved and improve.

Utility model content

In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide piano keyhoard cover buffering dress Put, it is intended to solve built-in buffer for cover on piano keyboard cost height, the technology of cover of keyboard both ends unbalance stress in the prior art and ask Topic.

In order to achieve the above object, the utility model takes following technical scheme：

A kind of buffer device for keyboard cover of piano, including be arranged at the first descending lifeline of piano left plate and be arranged at the piano right side Second descending lifeline of side plate, each descending lifeline include a circular cylinder body, are respectively arranged at the bottom at the cylinder both ends respectively Plate and cover plate, it is fixed on what the mandrel on bottom plate, the torsion spring being sheathed on the mandrel and push rod were coaxially disposed and be rotatably connected Rotating shaft and the clamp clip for being connected with piano keyhoard cover；The torsion spring is located at bending end and bottom plate clamping at bottom plate；Institute State rotating shaft to stretch into cylinder from cover plate, the bending being provided with for torsion spring adjacent to cover plate is stretched on one end in cylinder in the rotating shaft The catch abutted against is held, one end that the rotating shaft is located at outside cylinder is connected with the clamp clip；The torsion spring of first descending lifeline and The torsion spring of second descending lifeline it is oppositely oriented.

In described buffer device for keyboard cover of piano, one is provided with the bottom plate and is used for the recessed of clamping torsion spring bending end Groove, the groove include an annular groove and the strip groove tangent with annular, the diameter width and torsion spring of the annular groove Profile is adapted.

In described buffer device for keyboard cover of piano, two bending ends of the torsion spring have a U-shaped end respectively.

In described buffer device for keyboard cover of piano, be coaxially disposed a bearing on the cover plate, the rotating shaft with The bearing is interference fitted.

In described buffer device for keyboard cover of piano, the rotating shaft is stretched into the side wall of one end in cylinder along the axle of rotating shaft To straight line groove is offered, the catch inserts and rotating shaft clamping from straight-line groove.

In described buffer device for keyboard cover of piano, the cylinder body outer wall is provided with a lug at cover plate, and this is convex Ear offers two connecting holes.

In described buffer device for keyboard cover of piano, the clamp clip includes what one end for being located at rotating shaft outside cylinder was connected First clamp clip and the second clamp clip being arranged at below the first clamp clip, first clamp clip and the second clamp clip lead to Cross bolt connection.

In described buffer device for keyboard cover of piano, the first clamp clip lower surface is provided with three inner screw sheaths side by side, Second clamp clip accordingly offers three through holes with above-mentioned each inner screw sheath.

Beneficial effect：

The utility model provides a kind of buffer device for keyboard cover of piano, compared with prior art, buffer unit structure letter List, manufacturing cost are low, and by setting the first descending lifeline and the second descending lifeline respectively on two blocks of side plates of piano or so, and first is slow The torsion spring dropped in device and the second descending lifeline is oppositely oriented, ensure that both ends stress balance during piano lid decline, ensure that steel The frequent folding of qin lid is not susceptible to deform.In addition, the first descending lifeline and the second descending lifeline small volume, are built in piano side In, therefore the aesthetic property of piano is not influenceed.

Brief description of the drawings

Fig. 1 is the stereogram of buffer device for keyboard cover of piano provided by the utility model.

Fig. 2 is buffer device for keyboard cover of piano provided by the utility model and piano side plate and cover of keyboard scheme of installation.

Fig. 3 is the explosive view of the first buffer in buffer device for keyboard cover of piano provided by the utility model.

Fig. 4 is the partial enlarged drawing in S regions in Fig. 3.

Embodiment

The utility model provides a kind of buffer device for keyboard cover of piano, for make the purpose of this utility model, technical scheme and Effect is clearer, clear and definite, and the utility model is further described the embodiment that develops simultaneously referring to the drawings.It should be appreciated that Specific embodiment described herein only to explain the utility model, is not used to limit the utility model.

Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are referred to, the utility model provides a kind of buffer device for keyboard cover of piano.

Described buffer device for keyboard cover of piano, including be built in the first descending lifeline 100 of piano left plate and be built in Second descending lifeline 200 of piano right plate.To avoid repeating, buffering implement body knot is explained further exemplified by the first buffer below Structure, each descending lifeline include a circular cylinder body 130, are respectively arranged at the bottom plate 110 and cover plate at the cylinder both ends respectively 150th, the mandrel 120 that is coaxially fixable to cylinder on bottom plate, the torsion spring 140 being sheathed on the mandrel, it is coaxially disposed with push rod And the rotating shaft 160 being rotatably connected and the clamp clip for being connected with piano keyhoard cover；The torsion spring is located at the folding at bottom plate Bent-up end 141 and bottom plate clamping；The rotating shaft is stretched into cylinder from cover plate, and the rotating shaft, which is stretched on one end in cylinder to be provided with, to be used for The catch abutted against with torsion spring adjacent to the bending end 142 of cover plate, one end that the rotating shaft is located at outside cylinder are connected with the clamp clip； Oppositely oriented, the torsion spring rotation direction of the first descending lifeline shown in Fig. 3 of the torsion spring of first descending lifeline and the torsion spring of the second descending lifeline For dextrorotation.During assembling, in piano side plate built in circular cylinder body, and clamp clip is then connected with the end of piano lid.

In use, when cover of keyboard downwardly turns over, axis of rotation, the catch in rotating shaft abutted with the bending end of torsion spring and by To resistance caused by bending end, so as to realize slow drop.Because the overall structure of the first descending lifeline and the second descending lifeline is identical, but turn round Spring it is oppositely oriented so that piano lid decline during, both ends are identical by the resistance of torsion spring, ensure that piano lid is frequent Folding is not susceptible to deform.In addition, described descending lifeline is simple in construction, manufacturing cost is low, and can be built in piano side plate, full Foot piano requirement attractive in appearance.

Further, a groove for being used for clamping torsion spring bending end is provided with the bottom plate, the groove includes one Annular groove 111 and the strip groove 112 tangent with annular, diameter and width and the torsion spring profile of the annular groove are mutually fitted Should, strip groove is used for the bending end of clamping torsion spring.Aforesaid way processing is simple and torsion spring end effectively can be fixed on into bottom On plate.

Two bending ends of the torsion spring have a U-shaped end respectively, so as to expand the area at bending end, accordingly Ground, at bottom plate on the width of two straightways of depth and U-shaped end of strip groove that opens up it is equal so that the bending at floor End is more firm with bottom plate clamping, also increases catch and the contact area at the bending end at cover plate, further ensures cover of keyboard Effective slow drop can be obtained during decline.

Further, a bearing has been coaxially disposed on the cover plate（It is not drawn into figure）, the rotating shaft and the bearing Interference fit, realize rotating shaft and be coaxially rotatably coupled with cover plate, stability of rotation and processing simply.

Further, the rotating shaft stretches into the side wall of one end in cylinder that to offer straight line along the axial direction of rotating shaft recessed Groove（Not shown in figure）, the catch from straight-line groove insertion with rotating shaft clamping, wherein Pocket Machining is simple, and facilitate rotating shaft with Further it is connected after bearing fit with catch.

Further, the cylinder body outer wall is provided with a lug 131 at cover plate, and the lug 131 offers two Connecting hole.When the descending lifeline cylinder is built in piano side plate, lug is abutted with piano side plate, then lock-screw is connected certainly Hole penetrates up to piano side and tightened, and further enhances the connection of descending lifeline and piano side plate, it is long to avoid usage time Loosened after between cylinder and piano side plate.

Further, the clamp clip include the first clamp clip 170 that one end for being located at rotating shaft outside cylinder is connected and The second clamp clip 180 being arranged at below the first clamp clip, first clamp clip and the second clamp clip are bolted.

Further, the first clamp clip lower surface is provided with three inner screw sheaths 171 side by side, the second clamp clip with it is above-mentioned Each inner screw sheath accordingly offers three through holes（Not shown in figure）.The often end of piano lid also respectively correspondingly offers three Individual through hole, inner screw sheath are penetrated until interior spiral shell to insert in the through hole of piano lid, then by connecting bolt from the second clamp clip bottom In line set and tighten, so as to which piano lid be connected with descending lifeline.

In summary, buffer unit structure provided by the utility model is simple, manufacturing cost is low, and ensure that under piano lid Both ends stress balance during drop, it ensure that the frequent folding of piano lid is not susceptible to deform.By the way that torsion spring bending end is set into U-shaped End, the bonding strength of torsion spring and bottom plate is improved, increase the contact area of torsion spring and catch.By setting rotating shaft and bearing, Realize rotating shaft to be rotatably connected with cover plate, stability of rotation and manufacturing cost is low.

It is understood that for those of ordinary skills, can according to the technical solution of the utility model and The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model Scope of the claims.

Claims (8)

1. a kind of buffer device for keyboard cover of piano, including be arranged at the first descending lifeline of piano left plate and be arranged on the right side of piano Second descending lifeline of plate, it is characterised in that each descending lifeline includes a circular cylinder body, is respectively arranged at the cylinder respectively The bottom plate and cover plate at both ends, the mandrel on bottom plate, the torsion spring being sheathed on the mandrel are fixed on, is coaxially disposed and can turn with push rod The rotating shaft of dynamic connection and the clamp clip for being connected with piano keyhoard cover；The torsion spring is located at bending end and bottom at bottom plate Board connects；The rotating shaft is stretched into cylinder from cover plate, and the rotating shaft, which is stretched on one end in cylinder, to be provided with for neighbouring with torsion spring The catch that the bending end of cover plate abuts against, one end that the rotating shaft is located at outside cylinder are connected with the clamp clip；Described first slow drop The torsion spring of the torsion spring of device and the second descending lifeline it is oppositely oriented.

2. buffer device for keyboard cover of piano according to claim 1 a, it is characterised in that use is provided with the bottom plate Groove in clamping torsion spring bending end, the groove include an annular groove and the strip groove tangent with annular, the annular The diameter width of groove is adapted with torsion spring profile.

3. buffer device for keyboard cover of piano according to claim 2, it is characterised in that two bending ends of the torsion spring point Ju You not a U-shaped end.

4. buffer device for keyboard cover of piano according to claim 1, it is characterised in that be coaxially disposed on the cover plate One bearing, the rotating shaft are interference fitted with the bearing.

5. buffer device for keyboard cover of piano according to claim 4, it is characterised in that the rotating shaft stretch into cylinder one Straight line groove is offered along the axial direction of rotating shaft in the side wall at end, the catch inserts and rotating shaft clamping from straight-line groove.

6. buffer device for keyboard cover of piano according to claim 1, it is characterised in that the cylinder body outer wall is at cover plate A lug is provided with, the lug offers two connecting holes.

7. buffer device for keyboard cover of piano according to claim 1, it is characterised in that the clamp clip includes and rotating shaft position The first clamp clip connected in one end outside cylinder and the second clamp clip being arranged at below the first clamp clip, described first Clamp clip and the second clamp clip are bolted.

8. buffer device for keyboard cover of piano according to claim 7, it is characterised in that the first clamp clip lower surface is simultaneously Row is provided with three inner screw sheaths, and the second clamp clip accordingly offers three through holes with above-mentioned each inner screw sheath.