CN202003654U - Braking device for piano keyboard cover - Google Patents
Braking device for piano keyboard cover Download PDFInfo
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- CN202003654U CN202003654U CN2010205614115U CN201020561411U CN202003654U CN 202003654 U CN202003654 U CN 202003654U CN 2010205614115 U CN2010205614115 U CN 2010205614115U CN 201020561411 U CN201020561411 U CN 201020561411U CN 202003654 U CN202003654 U CN 202003654U
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Abstract
The utility model relates to a braking device, in particular to a braking device for a piano keyboard cover, which can maintain accurate controlling force in long-term use without the need of a compression spring and ensures that no controlling force exists in open space, oil quickly moves to the space in the main body in the opposite direction to the compression and the piano keyboard cover can be easily opened in the resistance-free state. The braking device comprises a braking main body, a rotator, a first division board, a second division board and a sealing board, wherein the braking main body comprises a cylindrical cylinder part; the sealing board is arranged in front of the cylinder part; the second division board, the first division board and the rotator are sequentially arranged on the inner side of the sealing board; an oil chamber is formed on the inner side of the first division board; an oil escape space is formed between the second and the first division boards; shaft holes are formed in the middles of the first and the second division boards, as well as the sealing board; a rotating shaft of the rotator penetrates the shaft holes; the rotator comprises a rotation main body immersed in the oil chamber, the rotating shaft penetrating the first division board, the second division board and the sealing board, and a rotation wing extending out of the sealing board; a space connection hole is formed on the first division board and connects the oil chamber and the oil escape space; and control valves are symmetrically arranged on the horizontal plane of the braking main body and used for controlling oil flow in both the oil chamber and the oil escape space. The braking device has a simplified structure, is economical, has high benefit, and can generate natural controlling force. When used together with the sealing board, the braking device can easily keep levelness of the piano keyboard cover.
Description
Technical field
The utility model relates to a kind of clamping device, specifically, relate to a kind of clamping device of piano keyhoard cover.
Background technology
As everyone knows, general rotation key element, such as various lids such as piano, refrigerator-freezer, door etc. in order to make the not open and close hastily such as lid, door of control closing force, and have been used revolving clamping device.
Rotary clamping device always is with the rotary clamping device of elastomeric element type of elastomeric elements such as spring with the rotary oil body clamping device of viscosity oil body control.
The rotary braking of elastomeric element type and Republic of Korea publication 88-14508 number are the same, and the inside of sleeve pipe and sleeve pipe can rotate the one section outstanding axle that inserts, and as above, between mounting sleeve and the axle, constitutes the elastomeric element of the control of giving axle.
So rotary braking of elastomeric element type, control can take place for two directions (clockwise and counter clockwise direction).If only need folk prescription, can not adopt this method, because along with the elastic force of the elastomeric elements such as spring of continuous use can change, so can not retentive control power to control.
Also have, rotary oil brake always and United States Patent (USP) the 5th, 635, No. 655 the same, the hollow type sleeve pipe that has whole open space, it is outstanding to form a section of rotating insertion at inside pipe casing, as above, the projection of interior volume and radial outstanding axial region, the projection of axial region is together with the inner peripheral surface of above sleeve pipe, outer peripheral face and the operation valve that is adjacent to the state operation, as above, the plug of the operation valve that as above is rotated that inside pipe casing is outstanding, as above, the plug members at locking sleeve pipe two ends, as above, constitute the viscous fluid of charging in the space, as above, be formed on the mutual different fluid passage that section is arranged in two side of operation valve, as above, be formed with projection such as the bigger section fluid passage of last all fluid passages.
When rotary like this oil brake projection is rotated, projection and by the viscous liquid in the side field in operation valve zoning space, by forming the fluid passage of projection and operation valve, when flow in its side field, the effect of fluid passage is the opposing key element of viscous fluid flow, and can controlled power.
Along with two single faces of desirable projection and operation valve are adjacent to the medial surface of both sides plug members, flowing of viscous fluid do not taken place in its centre, by having only the fluid passage of projection and operation valve, flowing of viscous fluid can be taken place.
But the medial surface of two single face both sides plug members of projection and operation valve is arranged radial state, can be adjacent in order to rotate, and can not use rubber ring etc.Two single face both sides plug members of projection and operation valve should keep the state that directly is adjacent to.If rotation has the difference in some spaces, in the middle of the side of projection and two single faces that move valve and both sides plug members, be bound to take place the internal leakage of the viscous fluid between the field, both sides according to example.
In two single faces of projection and plug members and the field, both sides between the plug members medial surface of both sides,,, can not bring into play the control of correct setting like this at the section of the fluid passage that forms the operation valve if viscous fluid flow takes place.
Recently in order to solve such problem points, develop more perfect clamping device, below is exactly our describing in detail with reference to drawing about clamping device of developing.
Fig. 1 is examples of implementation of the prior art, the fingerboard lid drawing of clamping device, Fig. 2, the 3rd, according to prior art embodiments, the fingerboard lid decomposition drawing of clamping device, Fig. 4, the 5th, according to examples of implementation of the prior art, the fingerboard lid vertical disconnected cross-sectional side view of clamping device, Fig. 6 is the IV-IV line sectional drawing of Fig. 4, Fig. 7 is according to examples of implementation of the prior art, the fingerboard lid section figure of clamping device body, Fig. 8 is according to prior art embodiments, and fingerboard lid clamping device comprises that first divides the oil circulation hole of plate and the expansion sectional drawing of hole slot.
More than the reference, from Fig. 1 and even Fig. 6, the 10th, brake, 20 is first division plates, 30 is second division plates, the 40th, coffer, the 50th, turning axle, the 60th, the rotation wing, the 70th, operation valve.
As above, brake 10 through board 12 back side central parts, for the supporting axis 13 of supporting rotating shaft 50 forms outstandingly, form nut portion 14 at the patent part side inner peripheral surface.
As above, back single portion outer peripheral face of brake 10, the fixed body 1 that the rotary body of lid etc. (figure) can rotate, install for fixing fixed body forms fixingly with carriage 15, forms one, forms the screw that connects fixed screws 3 with carriage 15 and connects the hole fixing.
As above, first divides plate 20, and the same with Fig. 4,5 diagram, the inner space of inserting brake 10 is formed with oiling space S 1 through the centre of board 12, forms an axle hole 21 at central part.
As above, second divides plate 30, and with Fig. 2,3 the same with Fig. 4,5 diagram, as above at first rear side of dividing plate 20, the inner space and first of inserting brake 10 is divided and formed oily escape space S 2 between the plate 20, forms an axle hole 21 at central part.
As above, in order between the back side positive and the as above first division plate 20 of the second division plate 30, to form oily escape space S 2, form a majority spaced protrusions.
Form the nut portion 14 of brake 10 at the outer peripheral face of coffer 40, the screw portion 42 that concludes screw, as above, turning axle 50, the same with the diagram of Fig. 2 or 5, connect the first division plate 20 and second and divide the axle hole 21 that plate 30 also has coffer 40,31,41, first end face brake off body 10 through the back side of board 12, rearward end is installed outstanding to the rear of coffer 40.
As above, form the support groove 51 of the supporting axis 13 that sandwiches brake 10 in the first end of turning axle 50, between supporting axis 13 and support groove 51, insert lining 52.
In turning axle 50 rearward end, in the time of in conjunction with the rotary body of lid etc., form angle type portion 53 in order to prevent idle running.
One double-vane 60, the same with the diagram of Fig. 2 or Fig. 6, both sides, the first end outer peripheral face that is formed on turning axle 50 is outstanding, is adjacent to contact cylindrical portion 11 inner peripheral surfaces and also has first to divide plate 20 through board 12 in oiling space S 1.
As above, the same with the diagram of Fig. 2 or Fig. 6 at the wing 60, association class seemingly
The contact mat 61 of the section of font as above, contact mat 61 be adjacent to, contact brake 10 cylindrical portion 11 inner peripheral surfaces the circular horn portion 62 that circular horn type surface of contact 62a is arranged and in the both sides of circular horn portion 62, the engagement groove 64 that forms by a pair of wall portion 63 that prolongs to the center position of turning axle 50.
As above, 61 pairs of wings 60 of contact mat move combination to the radial direction of turning axle 50.
As above, a pair of valve body 72, deviate from by the center of turning axle 50 is the rotation symmetric form of benchmark, by turning axle 50 is benchmark, through the medial surface both sides of board 12 along with the inner peripheral surface of cylindrical portion 11, form and prolongation that turning axle 50 is parallel inner formation ball receiving space 73, in the side of guide vane 60 directions, the formation that connects ball receiving space 73 and oiling space S 1 is connected the ball gateway 75 of the oil flow hole 74 of ball receiving space 73 and oiling space S 1 in rearward end formation and 71 connections of valve hole.
As above, ball valve 76 is the ball receiving spaces 73 of accommodating a pair of valve body 72, for switch a pair of valve hole 71 is installed by ball gateway 75.
As above, valve body 72 is at ball receiving space 73, for valve ball 76 is usually supported elastic force and inserted compression spring 77 to valve hole 71 sides.
As above, first position of dividing plate 20 isolation valve holes 71 begins, and the circular horn type space that in the zone of certain angle, connects, is communicated with oiling space S 1 and oily escape space S 2 is connected hole 81 and connects the certain width of formation.
As above,
First divides the interval of the certain angle in plate 20 fronts, and one section portion is communicated with connection space and connects hole 81, forms the degree of depth and gradually reduction since one section portion, and his section portion forms certain width by second draw-in groove 82 of dividing plate 30 lockings.
As above, in the middle of hole slot 82, form narrow throat 83.
As above, when dividing the assembling of plate 20 about brake 10 first, for the ball gateway 75 of valve body 10 correct, consistent with valve hole 71, cylindrical portion 12 inner peripheral surface both sides at brake 10 form determining positions projection 16, form the determining positions groove 22 of correspondence position decision projection 16 along portion in first periphery of dividing plate 20.
As above, suggestion, in position arbitrarily, determining positions projection 16 can form with valve body 72 irrelevant, and the inner peripheral surface of brake 10 is followed in formation on valve body 72.
As above, inject hole 17 at the oil that forms together with the ball receiving space 73 of valve body 10 through board 12 of brake 10, oil injects hole 17 by packaged unit 18 lockings.
As above, divide around the axle hole 31 at plate 30 back sides and outer circumferential surface section formation rubber ring recess 33 second, 34 make the opening portion, rear of airtight brake 10 airtight by coffer 40, second divide the flanger portion 91 at plate 30 back sides and prolong the axle hole 41 of coffer 40 from flanger portion 91 to the rear and the outer peripheral face of turning axle 50, the lining portion 92 that inserts uses and has above lining 90, at rubber ring recess 33,34 insert rubber ring 93 separately, 94 rubber rings 93 are adjacent to flanger portion 91, rubber ring 94 is adjacent to by coffer 40, and it is airtight that it can be kept.
Fig. 9 is the examples of implementation according to always, and the fingerboard lid is with the actuator state figure of clamping device.
With reference to more than, turning axle 50, the wing 60, check valve 70, the space of Fig. 9 a diagram piano key when the horizontality of lid is closed connects the state of hole 81 and hole slot 82, the circulate state of hole 74 sides of the oil that also has the wing 60 to keep valve body 72.
In this state, lift the fingerboard lid, the turning axle 50 and the wing 60 begin rotation in the direction of the clock, at the oil of the clockwise direction of the wing 60 pressurization oiling space S 1, in the counter clockwise direction side generation negative pressure of the wing 60.
At this moment, the oil that pressurizes in the clockwise direction side of the wing 60 connects hole 81 to 2 escapes of oil escape space S by the space, counter clockwise direction at the wing 60, oil by negative pressure oil escape space S 2, push away valve ball 76 by valve hole 71, counter clockwise direction side oiling space S 1 by ball gateway 75, ball receiving space 73 and oil circulation hole 74 guide vanes 60 flows into, and control does not take place.
Open space does not take place in such control, and is the same with Fig. 9 b diagram from Fig. 9 a, the wing 60 to connection hole 81, space till carry out.
By rotary oil brake device of the present invention, can support that the fingerboard lid of piano rotation fixed body 1 is a benchmark, the control from Fig. 9 a to 9b is not become impatient acute the conflict, sets the space of opening to the upright position from the horizontal closing state of fingerboard lid.
Along with the user open from fingerboard lid horizontality to plumbness, only bear the weight of keyboard lid, effortlessly be easy to open.
After, the fingerboard lid surpasses plumbness, and the user looses one's grip also and can continue hypsokinesis by the reason of the deadweight of fingerboard lid.The wing 60 be connected with the space hole 81 overlapping after, the section achievement that the space that the wing 60 clockwise direction sides leave connects hole 81 more and more reduces, the oil that connects hole 81 is escaped to oil escape space S 2 by connecting hole 81, the opposing of flowing is increased, control takes place in the degree that does not clash in fingerboard lid and fixed body 1.
In the usefulness of avoiding a conflict of sample, it is the same with Fig. 9 c diagram that control generation open space, Fig. 9 b begin, and the wing 60 connects hole 81 by the space to carry out to valve body 72.
State at Fig. 9 c, the section achievement that the space that the clockwise direction side of the wing 60 leaves connects hole 81 is that " 0 " is in the process that the fingerboard lid is opened, the state of maximum control takes place, because such effect, the fingerboard lid does not clash in open terminal and fixed body 1.
The state of opening fully in fingerboard lid reclined position, the state of visible Fig. 9 c, turning axle 50 and 60 to rotation counterclockwise is in the oil of the counter clockwise direction pressurization pressurization oiling space S 1 of the wing 60 clockwise direction generation negative pressure at the wing 60.
Connect hole 81 at the oil of the counter clockwise direction of the wing 60 pressurization by the space and flow, connect hole 81 by the oil of negative pressure oil escape space S 2 by the space, flow into, control does not take place to oiling space S 1 in the clockwise direction of the wing 60 to oil escape space S 2.
Close space does not take place in control like this, and it is the same with Fig. 9 b diagram that Fig. 9 c begins, and the wing 60 carries out to breaking away from connection hole 81, space.
By rotary oil brake device of the present invention, can support that the fingerboard lid of piano rotation fixed body 1 is a benchmark, close space does not take place in the control from Fig. 9 c to 9b, and the fingerboard lid is set the space of closing from the retroverted state to the upright position.
Along with retroverted state to the closing of plumbness, only bear the weight of fingerboard lid, effortlessly close easily.
After, the fingerboard lid surpasses plumbness, and the user looses one's grip also and can be continued to close by the reason of the deadweight of fingerboard lid.The wing 60 flows into to receiving space 73 by oil circulation hole 74 at the oil of the counter clockwise direction pressurization of the wing 60 to the state of hole slot 82, lift valve ball 76, valve ball 76 is by 75 locking-valve holes 71, ball gateway, the oil of oiling space S 1 can not be escaped to escape space S 2 of oil, oiling space S 1 has only by hole slot 82 connection space connection hole 81 narrow owing to escaping the path, the control that the generation of fingerboard lid is slowly closed.
Control generation close space like this begins equally with Fig. 9 d diagram from Fig. 9 b, the wing 60 carries out to the throat of hole slot 82.
Also have, the degree of depth of the part in hole slot 82 connection space connection hole 81 is the darkest, part near valve body 72 forms the most shallow degree of depth, the same with Fig. 9 b, the wing 60 is connected control when there is boundary portion in hole 81 to hole slot 82 with the space, minimum valve body 72 sides of moving towards take place in control generation close space increasing control takes place.
Along with fingerboard lid deadweight, from the upright position to horizontal level together with process, the scram action of fingerboard lid does not take place, slowly close.
Location status before the fingerboard lid arrives horizontal level, the wing 60 breaks away from throat 83, little control takes place in the control than throat 83, moreover the wing 60 is in the process of the terminal part of hole slot 82, the degree of depth slowly shoals, when the oil that the counter clockwise direction side of the wing 60 leaves was nearly all escaped, control reduced, and the fingerboard lid does not use clamping device, the state that control takes place is so the fingerboard lid is slowly closed.
In such control close space decrescence, control takes place in the degree that does not clash in fingerboard lid and fixed body 1.Rapid conflict does not take place in fingerboard lid and fixed body 1.
The same with the diagram of Fig. 9 a, the wing 60 is to the state of the whole guide vane 60 clockwise direction side flow of oil of valve body 72 oiling space S 1, and control does not take place the oil in that the counter clockwise direction side of the wing 60 is not stayed, and the fingerboard lid becomes complete closing state.On the one hand, in conjunction with contact pad designed 61, the wing 60 is removed about cylindrical portion 11 inner peripheral surfaces of brake 10 and the state that is adjacent to through the back side and first front of dividing plate 20 of board 12 internal leakage is not taken place at the wing 60.
Also have, contact pad designed 61 can flow about the radial direction of the wing 60 to turning axle 50, because combination, by the pressure that refuels, contact pad designed 61 cylindrical portion 11 inner peripheral surfaces to brake 10 are adjacent to the direction pressurization, can clearly prevent to reveal.
Also have, two sides at the wing 60 form turning axle 50 and parallel guide projection 65, engagement groove 64 medial surfaces contact pad designed 61 form corresponding guide projection 65 to guide groove 66, to the radial direction width of guide groove 66 radial direction width than guide projection 65, form wide, guide projection 65 with to guide groove 66 contact pad designed 61 pairs of wings 60 with to the parallel direction-guidance of rotating shaft 50 time, contact pad designed 61 is mobile to radial direction about the wing 60, clearly prevent to reveal, simultaneously, the radial direction of contact pad designed 61 pairs of wings 60 during assembling operation does not anyly break away from, and simply finishes assembling operation.
But, in sum, the clamping device of fingerboard lid always possesses compression spring 77 and the check valve 70 that lifts valve ball 76, according to the tension force of compression spring 77, control has affected problem points, special clamping device always possesses a plurality of check valve 70, in the inside of each check valve 70 compression spring 77 is arranged respectively, if tension force that can not consistent each compression spring 77, the tension force of other compression spring 77 changes easily so, and this also is by the problem points to the control influence.
Also have, open space does not take place in control, the oil that pressurizes in the clockwise direction of the wing 60 connects hole 81 to 2 escapes of oil escape space S by the space, counter clockwise direction at the wing 60 pushes away valve ball 76 by negative pressure oil escape space S 2 oil by valve hole 71, by ball gateway 75 and receiving space 73, also have the counter clockwise direction side oiling space S 1 of oil circulation hole 74 guide vanes 60 to flow into, control does not take place.But, because oiling space S 1 and oily escape space S 2 are very narrow, the slick and sly effect of can not circulating being arranged, trickle control when the user lifts the fingerboard lid, has the problem points of effort.
Simultaneously, fingerboard lid clamping device always, check valve is the main composition of device, the complex structure of check valve, built-up time is long, needs to increase the quantity of part, and uneconomic problem points is arranged.
Also has fingerboard lid clamping device always, the ball receiving space 73 through board 12 and brake 10 that is communicated with brake 10 forms oil and injects hole 17, owing to oil inject hole 17 from central authorities to the inclined to one side reason of edge part direction, when injecting oil, there is homogeneous to inject the problem points of the inside difficulty of brake 10, because the inside of brake 10 is by two minutes of the wing 60 equalizations, one side oil any lay particular stress on into, have can not two minutes problem points.
Also has fingerboard lid clamping device always, during the action of keyboard lid, position according to the keyboard lid, because the changeability of control action, though needing the space to connect hole 81 changes, the space connects the wide length that hole 81 forms unification, and control is bound to take place, and the action of keyboard lid has not efficient problem points.
Also has fingerboard lid clamping device always, the edge at the first division plate 20 in conjunction with brake 10 forms most determining positions grooves 22, the inside of brake 10 outstanding binding site decision projection 16 is fixed the first division plate 20 does not dally it, do not fix second and divide plate 30 coffer 40 fixedly brake 10 time, the problem points that makes its level in distress, if can not level, can cause screw 42 breakages on coffer 40 periphery edges.
Also have, the second division plate 30 is formed on one side spaced protrusions 32 and forms most the spaced protrusions 32 at interval separately, because the securing member of coffer 40, second divides plate 30 after first direction of dividing plate 20 is adjacent to strongly, spaced protrusions 32 is arranged by damaged problem points.
Summary of the invention
The utility model provides a kind of compression spring that do not use, long-time use also can be kept correct control, control does not take place in open space, oil moves to the opposition director space of body interior pressurization rapidly, under the state of resistance, open the keyboard lid easily, form the structure simplification, economic profit is big, and the nature control can take place.During in conjunction with coffer, provide the fingerboard lid of keeping level easily clamping device.
The technical scheme of piano keyhoard cover clamping device of the present utility model is such: it comprises brake, rotary body, first divides plate, second divides plate, coffer, brake comprises a cylindrical barrel portion, coffer is arranged on the place ahead of cylindrical portion, second divides plate, the first division plate and rotary body are successively set on the inboard of coffer, first divides the inboard oil pocket that forms of plate, the second division plate and first is divided between the plate oily escape space is set, first divides plate, second divides plate, form the axle hole in the middle of the coffer, the turning axle of rotary body passes a hole, rotary body comprises rotating body, turning axle, the rotation wing, rotating body is immersed in the oil pocket, turning axle passes first and divides plate, second divides plate, coffer, the rotation wing leans out coffer, on the first division plate space is set and connects the hole, connect the hole and connect oil pocket and oily escape space, be symmetrical arranged operation valve at the surface level of brake, this operation valve can be controlled the flowing of oil in oil pocket and oily escape space.
Operation valve comprises limited block, valve body, and limited block is fixed on the inboard of brake, and interior side opening, valve body are arranged in the limited block, is set to " comma " shape, and the major part of comma shape valve body is arranged in the limited block, and afterbody leans out the opening of limited block.
The space connects the hole upper and lower settings to be divided on the axial plane of plate first, and width narrows down gradually, and the centre is provided with throat.
First divides the arranged outside draw-in groove of plate, the locator protrusions that inboard correspondence position setting of the cylindrical portion of brake and draw-in groove cooperate.
The cylindrical portion of brake is provided with oil injection hole with respect to the another side of turning axle, injects the logical hole that the hole forms connection in the position of turning axle along fixed part and oil.
In first lower end of dividing the draw-in groove of plate, corresponding locator protrusions is provided with plural fixed projection.
The face of dividing plate in second correspondence first of dividing plate is provided with circular spaced protrusions.
Operation valve is arranged on the two ends of the movement locus of the rotation wing, carries out spacing to the rotation wing.
Piano keyhoard cover clamping device of the present utility model when effectively reducing the quantity of part, obtains correct control, constant control under long-time the use, and can keep down always.The user also can open the keyboard lid at the open space of non-control force with not taking a bit strength, even use piano for a long time, the control of keyboard lid can not change yet, and keeps brand-new control always.
Description of drawings
Fig. 1 is the structural representation of fingerboard clamping device in the prior art;
Fig. 2 is prior art embodiments, the piano keyhoard cover decomposition drawing of clamping device;
Fig. 3 is prior art embodiments, the piano keyhoard cover decomposition drawing of another angle of clamping device;
Fig. 4 is prior art embodiments, the piano keyhoard cover vertical disconnected cross-sectional side view of clamping device;
Fig. 5 is prior art embodiments, the piano keyhoard cover vertical disconnected cross-sectional side view of clamping device;
Fig. 6 is the IV-IV line sectional drawing of Fig. 4;
Fig. 7 is prior art embodiments, the section figure of piano keyhoard cover clamping device body;
Fig. 8 is prior art embodiments, and the piano keyhoard cover clamping device comprises that first divides the oil circulation hole of plate and the expansion sectional drawing of hole slot;
Fig. 9 a is prior art embodiments, the fingerboard lid movement state diagram of clamping device;
Fig. 9 b is prior art embodiments, the fingerboard lid movement state diagram of clamping device;
Fig. 9 c is prior art embodiments, the fingerboard lid movement state diagram of clamping device;
Fig. 9 d is prior art embodiments, the fingerboard lid movement state diagram of clamping device;
Figure 10 is the decomposition drawing of piano keyhoard cover of the present utility model with clamping device;
Figure 11 is the decomposition drawing of piano keyhoard cover of the present utility model with clamping device;
Figure 12 is the plane cross section of piano keyhoard cover clamping device of the present invention;
Figure 13 a is the movement state diagram of piano keyhoard cover clamping device of the present invention;
Figure 13 b is the movement state diagram of piano keyhoard cover clamping device of the present invention;
Figure 13 c is the movement state diagram of piano keyhoard cover clamping device of the present invention;
Figure 13 d is the movement state diagram of piano keyhoard cover clamping device of the present invention.
Embodiment
It comprises brake piano keyhoard cover clamping device of the present utility model, rotary body, first divides plate, second divides plate, coffer, brake comprises a cylindrical barrel portion, coffer is arranged on the place ahead of cylindrical portion, second divides plate, the first division plate and rotary body are successively set on the inboard of coffer, first divides the inboard oil pocket that forms of plate, the second division plate and first is divided between the plate oily escape space is set, first divides plate, second divides plate, form the axle hole in the middle of the coffer, the turning axle of rotary body passes a hole, rotary body comprises rotating body, turning axle, the rotation wing, rotating body is immersed in the oil pocket, turning axle passes first and divides plate, second divides plate, coffer, the rotation wing leans out coffer, on the first division plate space is set and connects the hole, connect the hole and connect oil pocket and oily escape space, be symmetrical arranged operation valve at the surface level of brake, this operation valve can be controlled the flowing of oil in oil pocket and oily escape space.Operation valve comprises limited block, valve body, and limited block is fixed on the inboard of brake, and interior side opening, valve body are arranged in the limited block, is set to " comma " shape, and the major part of comma shape valve body is arranged in the limited block, and afterbody leans out the opening of limited block.The space connects the hole upper and lower settings to be divided on the axial plane of plate first, and width narrows down gradually, and the centre is provided with throat.First divides the arranged outside draw-in groove of plate, the locator protrusions that inboard correspondence position setting of the cylindrical portion of brake and draw-in groove cooperate.The cylindrical portion of brake is provided with oil injection hole with respect to the another side of turning axle, injects the logical hole that the hole forms connection in the position of turning axle along fixed part and oil.In first lower end of dividing the draw-in groove of plate, corresponding locator protrusions is provided with plural fixed projection.The face of dividing plate in second correspondence first of dividing plate is provided with circular spaced protrusions.Operation valve is arranged on the two ends of the movement locus of the rotation wing, carries out spacing to the rotation wing.
Below describe in detail with reference to drawing about the present invention.
Figure 10, the 11st, according to embodiments of the invention, the fingerboard lid decomposition drawing of clamping device, Figure 12 is according to embodiments of the invention, the fingerboard lid plane cross section of clamping device.
With reference to example, according to embodiments of the invention, the fingerboard lid does not use compression spring with clamping device 100, and long-time use also can be kept correct control, and control does not take place open space, oil moves to the opposition director space of body interior pressurization rapidly, under the state of opposing with all strength, open the keyboard lid easily, form the structure simplification, economic profit is big, and the nature control can take place.During in conjunction with coffer, reach the purpose that the fingerboard lid of keeping level is easily used clamping device.
At first, according to embodiments of the invention, the fingerboard lid is similar with piano clamping device always with clamping device 100 essential structures, describes in detail about whole structures, is described in more detail about the characteristic structure of the present invention.
In Figure 10 or Figure 12, the 10th, brake, 120 is first division plates, 130 is second division plates, the 40th, coffer, the 150th, turning axle, the 60th, the rotation wing, the 102nd, valve body, the 172nd, limited block.
As above, brake 10 through board back side central part, for the outstanding patent part side inner peripheral surfaces that are formed on of supporting rotating shaft 150 supporting axis 13 form nuts 14.
As above, at the back segment portion outer peripheral face of brake 10,, form fixed screw 3 perforation screws perforation hole 15a with carriage 15 fixing for rotatable fixed body of fingerboard lid and the fixing carriage 15 formation one of using such as the fixing lids that can install.
In the front of the second division plate 130, in the middle of the back side of the first division plate 120,, form spaced protrusions 132 in order to form oily escape space S 2.
At this moment, in the middle of constituting, the spaced protrusions 132 that second one side of dividing plate 130 forms do not have " 0 " form of cut-off parts to prolong, because the securing member of coffer 40 is so though the second division plate 130 is adjacent to not damaged to the first direction brute force of dividing plate 120.
The supporting axis 13 that forms brake 10 in the first end of turning axle 150 inserts support groove 51, inserts lining 52 in the middle of supporting axis 13 and support groove 51.
In the fingerboard lids such as rearward end connection lid of turning axle 150,, form angle type portion 53 in order to prevent idle running.
The a pair of rotation wing 60 is the same with the diagram of Figure 10 or Figure 12, is formed on the inner peripheral surface that is adjacent to contact cylindrical portion 11 in the oiling space S 1 and divides plate 120 through board 12 and first in that the both sides, first end of turning axle 150 outer peripheral face is outstanding.
As above, at the rotation wing 60, the same with the diagram of Figure 10 or Figure 12, association class seemingly
The contact mat 61 of the section of font as above, contact mat 61 be adjacent to, contact brake 10 cylindrical portion 11 inner peripheral surface the circular horn portion 62 that round surface of contact 62a is arranged and in the both sides of circular horn portion 62, the engagement groove 64 that forms by a pair of wall portion 63 that prolongs to the center position of turning axle 150.
As above, 61 pairs of rotations of contact mat wing 60 can move combination to the radial direction of turning axle 150.
The periphery of at this moment advising turning axle 150 is along the adjacent institute bonding part of fixed part and the rotation wing 60, flows into logical hole 152 in the periphery of turning axle 150 along institute's bonding part oil, forms the symmetrical diameter of turning axle 150 separately.
More detailed, operation valve flows into the valve body 102 in limited block 172 and the limited block 172, limited block 172 is that benchmark is in the medial surface both sides through board 12 with turning axle 150, inner peripheral surface and the parallel prolongation of turning axle 150 formation along with cylindrical portion 11, form valve body receiving space 174 in inside, at the interior side direction formation opening 175 of valve body receiving space 174.Simultaneously, be benchmark with the center of turning axle 150, finish a pair of symmetry rotation and arrange.
That is: the opening 175 by limited block 172, the valve body 102 that expose the outside, the reason of the pressure of the oil that takes place owing to the rotation of substantive turning axle 150, rotation can be guaranteed oily free air space, turning axle 150 is realized the direction circulation structure of oil pressure locking oil free air space by rotation counterclockwise.
The open space of control is not taking place in the operation valve wing 106, during 106 rotations of the operation valve wing, and open oil circuit, in the close space that control takes place, during 106 rotations of the operation valve wing, the locking oil circuit forms a lateral bending song.
That is: the diagram of the operation valve wing 106 and Figure 10 is the same, and turning axle 150 is to when clockwise rotates, and in order to open the path of oil, first end to clockwise direction inclined to one side bending takes place.
Also have, the length that the operation valve wing 106 cuts according to opening 175, the rotation of system limit, expose combination to opening 175 outsides, that is: the major part 104 of operation valve is arranged on sending out in the body receiving space 174 of valve body 172, the operation valve wing 106 that the major part 104 of operation valve prolongs exposes by opening 175 outsides, so the rotation length of the operation valve wing 106 is subjected to the restriction of opening 175.
As above, first divides the position of plate 120 from valve body 172, and the space that in the zone of certain angle, connects, is communicated with oiling space S 1 and oily escape space S 2 is connected hole 81 and connects the certain width of formation.
As above, in first interval of dividing the certain angle in plate 120 fronts, a part is communicated with connection space and connects hole 181, begins to form the degree of depth and gradually reduces from a part, and another part forms certain width by the draw-in groove 82 of the second division plate, 130 lockings.
The tip width of draw-in groove 82 is very wide, and the width that forms the rear end slowly narrows down.
Suggestion, piano keyhoard cover clamping device 100 of the present invention, during the action of keyboard lid, control is along with the position of keyboard lid, in order to reach action variable, nature, the space connects hole 181 and cuts bigger width at a tip, and that cuts behind its end widely slowly narrows down, because when the keyboard lid is lifted or closes, along with the control of the change in location generation nature of keyboard lid.
When dividing the installation of plate 120 about brake 10 first, the switching degree that is connected hole 181 by the pressure of turning axle 150 oil with the space, in order to reach consistent, brake 10 form locator protrusions 16 through board 12 inner peripheral surface both sides, form the locating slot 22 of corresponding locator protrusions 16 along portion in first periphery of dividing plate 120.
Suggestion, oily injection hole 117 form through the centre of board 12 and pass through oil injection hole 117 injection oil, by the rotation wing 60 peripheral logical holes that the form 152 injection brakes 10 of turning axle 150.
Also have, the peripheral part of the rotation wing 60 also has the periphery edge of turning axle 150, is the logical hole 152 that benchmark forms most symmetries with each spinning wing 60.
Divide around the axle hole 31 at plate 130 back sides and outer circumferential surface section forms rubber ring recess 33 separately second, 134, opening portion, rear by coffer 40 airtight brakes 10, be adjacent to second divide plate 130 the back side flanger portion 91 and prolong to the rear from flanger portion 91, in the middle of the axle hole 41 of insertion coffer 40 and the outer peripheral face of turning axle 150, lining portion 92 in the middle of inserting, use has above lining 90, at rubber ring recess 33,134 insert rubber ring 93 separately, 94, it is airtight that the rubber ring 94 that rubber ring 93 is adjacent to flanger portion 91 can be kept coffer 40 to be adjacent to.
Suggestion, the present invention is according to always fingerboard cover controlling device 100, the one side institute bonding part that comprises the second division plate 130 of control device 100, insert most the rubber ring recess 134 of locating slot 22 formation that form the first division plate 120 and make its inner locator protrusions 16 in conjunction with the bottom along with locating slot 22 forms, top is fixed the first division plate, 120 second division plates 130 by rubber ring recess 134 simultaneously in conjunction with locator protrusions 16.
Along with second when dividing plate 130 and be fixed to brake 10 by coffer 40, hold level easily, make the screw 42 on the periphery edge that forms coffer 40 not damaged.
As above, function and effect according to constituting the clamping device that piano keyhoard cover always of the present invention uses describe in detail with reference to drawing.
Figure 13 a, 13b, 13c, 13d are the clamping device actuator state figure that uses according to piano keyhoard cover always of the present invention.
At first, Figure 13 a, 13b, 13c, 13d are that the clamping device used according to piano keyhoard cover always of the present invention is from the bottom surface, utilize the schematic sectional illustration actuator state, turning axle 150, the rotation wing 60, operation valve, space when Figure 13 a diagram fingerboard lid horizontality is closed connects the state of hole 181 and hole slot 82, and the rotation wing 60 is opening 175 location statuss at limited block 172.
In this state, lift the fingerboard lid, the turning axle 150 and the rotation wing 60 begin rotation in the direction of the clock, at the oil of the clockwise direction pressurization oiling space S 1 of rotating the wing 60, in the counter clockwise direction side generation negative pressure of the rotation wing 60.
At this moment, the operation valve wing 106 that flows into the valve body 102 of limited block 172 at the oil of the clockwise direction side pressurization of the rotation wing 60 pressurizes for rotation to clockwise direction, so the operation valve wing 106 is being tried hard to recommend the open words of oil circuit by oil pressure, the sense of rotation of the oil and the rotation wing 60 moves to the direction of opposing easily.
Control generation close space like this begins equally with Figure 13 b diagram from Figure 13 a, rotate the wing 60 connects hole 181 to the space throat and carry out.
By rotary oil brake device of the present invention, can support that the fingerboard lid of piano rotation fixed body 1 is a benchmark, open space does not take place in the control from Figure 13 a to 13b, sets from the space that the horizontal closing state of fingerboard lid is opened to the upright position.
Along with the user open from fingerboard lid horizontality to plumbness, only bear the weight of keyboard lid, effortlessly be easy to open.
After, the fingerboard lid surpasses plumbness, the user looses one's grip also can be by the reason of the deadweight of fingerboard lid, continuing to close. the rotation wing 60 flows into to receiving space 73 by oil circulation hole 74 at the oil of the counter clockwise direction pressurization of the rotation wing 60 to the state of draw-in groove 82, lift valve ball 76, valve ball 76 is by 75 locking-valve holes 71, ball gateway, the oil of oiling space S 1 can not be escaped to escape space S 2 of oil, oiling space S 1 has only by hole slot 82 connection space connection hole 81 narrow owing to escaping the path, the control that the generation of fingerboard lid is slowly closed.
Control generation close space like this begins equally with Fig. 9 d diagram with Fig. 9 b, rotates the wing 60 and carries out to the throat of draw-in groove 82.
Also have, the degree of depth of the part in draw-in groove 82 connection space connection hole 81 is the darkest, part near valve body 72 forms the most shallow degree of depth, the same with Fig. 9 b, the rotation wing 60 is connected control when there is boundary portion in hole 81 to draw-in groove 82 with the space, minimum takes place in control generation close space can move towards the increasing control of valve body 72 sides generation.
Along with fingerboard lid deadweight, from the upright position to horizontal level together with process, the scram action of fingerboard lid does not take place, slowly close.
Location status before the fingerboard lid arrives horizontal level, the rotation wing 60 breaks away from time portion 83, little control takes place in the control than time portion 83, moreover the rotation wing 60 is in the process of the terminal part of draw-in groove 82, the degree of depth slowly shoals, when the oil that the counter clockwise direction side of the rotation wing 60 leaves was nearly all escaped, control reduced, and the fingerboard lid does not use clamping device, the state that control takes place is so the fingerboard lid is slowly closed.
In such control close space decrescence, control takes place in the degree that does not clash in fingerboard lid and fixed body 1.Rapid conflict does not take place in fingerboard lid and fixed body 1.
The same with the diagram of Fig. 9 a, the rotation wing 60 is oily all to the state that rotates the wing 60 clockwise direction side flow to valve body 72 oiling space S 1, control does not take place in the oil in that the counter clockwise direction side of the rotation wing 60 is not stayed, and the fingerboard lid becomes complete closing state.
On the one hand, according to embodiments of the invention, possess the piano clamping device of fixed part, not only qualification singly refers to above examples of implementation, and the scope that does not break away from technical purpose can the variation change.
Claims (8)
1. piano keyhoard cover clamping device, it comprises brake, rotary body, first divides plate, second divides plate, coffer, brake comprises a cylindrical barrel portion, coffer is arranged on the place ahead of cylindrical portion, second divides plate, the first division plate and rotary body are successively set on the inboard of coffer, first divides the inboard oil pocket that forms of plate, the second division plate and first is divided between the plate oily escape space is set, first divides plate, second divides plate, form the axle hole in the middle of the coffer, the turning axle of rotary body passes a hole, rotary body comprises rotating body, turning axle, the rotation wing, rotating body is immersed in the oil pocket, turning axle passes first and divides plate, second divides plate, coffer, the rotation wing leans out coffer, on the first division plate space is set and connects the hole, connects the hole and connects oil pocket and oily escape space, it is characterized in that: the surface level at brake is symmetrical arranged operation valve, and this operation valve can be controlled the flowing of oil in oil pocket and oily escape space.
2. piano keyhoard cover clamping device according to claim 1, it is characterized in that: operation valve comprises limited block, valve body, limited block is fixed on the inboard of brake, interior side opening, valve body is arranged in the limited block, be set to " comma " shape, the major part of comma shape valve body is arranged in the limited block, and afterbody leans out the opening of limited block.
3. piano keyhoard cover clamping device according to claim 1 is characterized in that: the space connects the hole upper and lower settings to be divided on the axial plane of plate first, and width narrows down gradually, and the centre is provided with throat.
4. piano keyhoard cover clamping device according to claim 1 is characterized in that: first divides the arranged outside draw-in groove of plate, the locator protrusions that inboard correspondence position setting of the cylindrical portion of brake and draw-in groove cooperate.
5. piano keyhoard cover clamping device according to claim 1 is characterized in that: the cylindrical portion of brake is provided with oil injection hole with respect to the another side of turning axle, injects the logical hole that the hole forms connection in the position of turning axle along fixed part and oil.
6. according to claim 1 or 4 described piano keyhoard cover clamping device, it is characterized in that: in first lower end of dividing the draw-in groove of plate, corresponding locator protrusions is provided with plural fixed projection.
7. according to claim 1 or 4 described piano keyhoard cover clamping device, it is characterized in that: the face of dividing plate in second correspondence first of dividing plate is provided with circular spaced protrusions.
8. piano keyhoard cover clamping device according to claim 2 is characterized in that: operation valve is arranged on the two ends of the movement locus of the rotation wing, carries out spacing to the rotation wing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205614115U CN202003654U (en) | 2010-10-14 | 2010-10-14 | Braking device for piano keyboard cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205614115U CN202003654U (en) | 2010-10-14 | 2010-10-14 | Braking device for piano keyboard cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202003654U true CN202003654U (en) | 2011-10-05 |
Family
ID=44706386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205614115U Expired - Fee Related CN202003654U (en) | 2010-10-14 | 2010-10-14 | Braking device for piano keyboard cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202003654U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374341A (en) * | 2014-08-12 | 2016-03-02 | 雅马哈株式会社 | Keyboard instrument |
| CN110189734A (en) * | 2013-09-19 | 2019-08-30 | 株式会社河合乐器制作所 | The keyboard lid arrangement of keyboard instrument and the opening and closing device of cover of keyboard |
-
2010
- 2010-10-14 CN CN2010205614115U patent/CN202003654U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110189734A (en) * | 2013-09-19 | 2019-08-30 | 株式会社河合乐器制作所 | The keyboard lid arrangement of keyboard instrument and the opening and closing device of cover of keyboard |
| CN110189734B (en) * | 2013-09-19 | 2023-02-17 | 株式会社河合乐器制作所 | Keyboard lid device of keyboard musical instrument and opening and closing apparatus of keyboard lid |
| CN105374341A (en) * | 2014-08-12 | 2016-03-02 | 雅马哈株式会社 | Keyboard instrument |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20131014 |