CN202662268U - Piano key cover descending device - Google Patents
Piano key cover descending device Download PDFInfo
- Publication number
- CN202662268U CN202662268U CN 201220294484 CN201220294484U CN202662268U CN 202662268 U CN202662268 U CN 202662268U CN 201220294484 CN201220294484 CN 201220294484 CN 201220294484 U CN201220294484 U CN 201220294484U CN 202662268 U CN202662268 U CN 202662268U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- oil
- rib
- chamber
- key cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model provides a piano key cover descending device, which belongs to the technical field of musical instrument accessories, and solves the problems that the existing piano key cover descending device is inconvenient to assemble and small in opening angle and the like. The piano key cover descending device comprises a rotating shaft and a shell, wherein two installing seats are arranged in the shell, the inner end of the rotating shaft is in sleeve connection with two doctor blades, the two doctor blades are respectively arranged in a left chamber and a right chamber, the shell is in threaded connection with a seal blind nut, the outer end of the rotating shaft extends out of the seal blind nut and is connected with a rotating arm, the rotating shaft is provided with an oil leak sheet located in an oil cavity, an end face of the oil leak sheet pressed against the installing seats is provided with two chutes which are centrosymmetric and extend circumferentially, the two chutes are respectively located in the left chamber and the right chamber, and the depths of the chutes close to the installing seats are gradually increased, the two installing seats are centrosymmetric, each installing seat is provided with a first stop edge and a second stop edge, compared with the first stop edge, the second stop edge is closer to the side face of the rotating shaft, and a swing hinge is embedded between the first stop edge and the second stop edge. The piano key cover descending device disclosed by the utility model has the advantages of convenient assembling and large opening angle and the like.
Description
Technical field
The utility model belongs to the musical instrument fitting technical field, relates to a kind of Piano Fittings, particularly a kind of piano key cover falling retarder.
Background technology
At present be equipped with piano key cover falling retarder on the piano, avoid accidentally lower turning over and weigh the person's of playing the musical instrument finger wounded of piano key cover, also avoid the piano key cover collision and fall to coat with lacquer.
Sustained piano closer structure and kind on the market are more, but ubiquity is slow to fall that stability is bad, larger shortcoming takes up room, for addressing the above problem, the applicant has designed a kind of piano key cover falling retarder and has applied for patent [application number: 200920118284.9; Granted publication number: CN201465527U], it comprises housing and the rotating shaft with oil pocket, be provided with the dividing plate that it is divided into left chamber and right chamber in the oil pocket, one end of rotating shaft be provided with two scraping blades and be located at respectively left chamber and right chamber in, the chamber wall of the outer rim of scraping blade and left chamber and right chamber is complementary, the other end of rotating shaft passes housing and is connected with the connecting link assembly, be provided with pressing plate in the oil pocket, the skewed slot that has the twice Central Symmetry on the pressing plate lower surface and circumferentially extend, skewed slot lays respectively in left chamber and the right chamber and its degree of depth is deepened gradually along bearing of trend, dividing plate is provided with groove, be provided with spring and steel ball in the groove, be provided with to match with steel ball at pressing plate and merge the through hole to form sealing.
When above-mentioned piano key cover falling retarder can make piano key cover descend from fast to slow, it is stable to descend, but during assembling, spring and steel ball are difficult for putting into groove, assembling is inconvenient, and spring and steel ball require groove to have enough installing spaces, this is just so that dividing plate has taken more space in the housing, reduced the space of oil pocket, namely reduce the rotational angle range of rotating shaft, so that the piano key cover opening degree is large not, above-mentioned piano key cover falling retarder has the draining hole at housing in addition, the draining hole is positioned at the bottom of a groove, because having left chamber and right chamber, the oil in two chambers is difficult to all focus in the chamber, has the halfway problem of draining.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, and a kind of easy to assembly, piano key cover falling retarder that opening angle is large is provided.
The purpose of this utility model can realize by following technical proposal: a kind of piano key cover falling retarder, comprise rotating shaft and have the housing of oil pocket, have two mount pads that oil pocket are divided into left chamber and right chamber in the described housing, the inner of described rotating shaft is socketed with two scraping blades and two scraping blades lay respectively in left chamber and the right chamber, the chamber wall of the outer rim of scraping blade and left chamber and right chamber is conflicted, the described housing seal screw cap that has been threaded, the outer end of described rotating shaft passes seal screw cap and is connected with a swivel arm, described rotating shaft is provided with the leakage of oil sheet that is positioned at oil pocket, the skewed slot that has the twice Central Symmetry on the end face that described leakage of oil sheet and mount pad are conflicted and circumferentially extend, two skewed slots lay respectively at left chamber and right chamber is interior and skewed slot is darker the closer to its degree of depth of mount pad, it is characterized in that, described two mount pad Central Symmetries and each mount pad all have the first rib and the second rib, described the second rib is longer than the first rib than the more close rotating shaft of the first rib side, interlocking has slew page between described the first rib and the second rib, formed oil-gap between described slew page and the rotating shaft side when slew page is resisted against the first rib, described slew page contacts the rotating shaft side and forms sealing when slew page is resisted against the second rib.
This piano key cover falling retarder swings by slew page and formed oil-gap or formed sealing with the rotating shaft side, slew page is thinner in the form of sheets, what therefore mount pad can be done is less, mount pad can not take oil pocket than large space like this, the scope that rotating shaft is rotated is large, so that the piano key cover opening angle is larger, between the first rib and the second rib, rabbet slew page in addition, it is also comparatively convenient to install.
Swivel arm in this piano key cover falling retarder is connected in the key lid, and when the key lid was in closed condition, scraping blade was resisted against on the first rib.When the key lid is opened, swivel arm drives rotating shaft and rotates, rotating shaft drives scraping blade and rotates, scraping blade is gradually away from the first rib, chamber between the two becomes large formation negative pressure cavity gradually, be resisted against on the first rib in slew page under the oil pressure effect, formed oil-gap between slew page and the rotating shaft, oil enters in the negative pressure cavity between scraping blade and the first rib soon by crossing oil-gap, makes oil pressure reach balance, and the key lid is opened easily quick, in key lid opening procedure, scraping blade is through skewed slot, and after the key lid was opened fully, scraping blade was resisted against on the second rib.When key being covered or accident when touching key lid the key lid being fallen, the moving swivel arm of key cover strip rotates, swivel arm drives rotating shaft and rotates, rotating shaft drives scraping blade and rotates, scraping blade is gradually away from the second rib, chamber between the two becomes large formation negative pressure cavity gradually, because the pressure between scraping blade and the first rib is greater than the pressure between scraping blade and the second rib, be resisted against on the second rib in slew page under the oil pressure effect, slew page contacts the rotating shaft side and forms sealing, oil can only flow between scraping blade and the second rib from skewed slot, because skewed slot is darker near its degree of depth of mount pad, thus oil enter into the flow of the negative pressure cavity between scraping blade and the second rib by skewed slot can be more and more less, therefore under the oil pressure effect so that the speed that the key lid descends can be more and more slower, until key covers, avoid the key lid to weigh the person's of playing the musical instrument finger wounded, also avoid the collision of key lid, prolonged the serviceable life of key lid, after the key lid closed up fully, scraping blade was resisted against on the first rib.
In above-mentioned a kind of piano key cover falling retarder, described slew page has the connecting portion that is column and the hinge section of arc-shaped flaky, and described connecting portion is embedded between the first rib and the second rib, and the arcwall face of described hinge section can contact mutually with the rotating shaft side.The column connecting portion is so that the slew page swing process is smooth and easy and slew page is installed the rear mount pad that is difficult for breaking away from, when slew page is resisted against the first rib, formed oil-gap between the arcwall face of hinge section and the rotating shaft, the arcwall face of hinge section is so that smooth and easy the passing through of oil, when slew page is resisted against the second rib, the arcwall face of hinge section can contact mutually with rotating shaft, and the contact area of arcwall face and rotating shaft side is many, good sealing effect.
In above-mentioned a kind of piano key cover falling retarder, offer two centrosymmetric oil leaking holes on the described leakage of oil sheet, described oil leaking hole is connected near mount pad and with skewed slot.When key being covered or accident when touching key lid the key lid being fallen, oil can comparatively fast enter in the negative pressure cavity of scraping blade and the second rib by oil leaking hole, and this moment, the key lid descended comparatively fast, when scraping blade goes to the skewed slot place, key covers just gradually slow decreasing, has reduced like this key and has covered the time.
In above-mentioned a kind of piano key cover falling retarder, be provided with seal pad in the described oil pocket, described seal pad is provided with fuel feeding by the logical oil groove of the annular of oil leaking hole on being contacted with leakage of oil sheet and seal pad.
In above-mentioned a kind of piano key cover falling retarder, be provided with pressing plate between described seal screw cap and the seal pad, be arranged with exterior seal ring and inner seal ring between seal pad and pressing plate on the described seal pad, described exterior seal ring is contacted with the chamber wall of oil pocket, and described inner seal ring is contacted with the rotating shaft side.There is not oil leakage phenomenon in the good seal performance that is arranged so that this piano key cover falling retarder of exterior seal ring and inner seal ring.
In above-mentioned a kind of piano key cover falling retarder, the center of described oil pocket bottom is provided with projection, and rotating shaft has the centralized positioning groove with the projection coupling, is provided with gland between described projection and the centralized positioning groove.Projection plays positioning action, so that the rotating shaft rotation process can not be offset, and rotating shaft rotation process good stability, gland is so that rotating shaft is rotated more stable and flexibly.
In above-mentioned a kind of piano key cover falling retarder, has the draining chamber between described gland and the projection, axially offer the draining hole that is connected with the draining chamber along projection on the described housing, a screw is plugged in the draining hole, offers the left draining hole that is communicated with left chamber and draining chamber and the right draining hole that is communicated with right chamber and draining chamber in the described rotating shaft and on the gland.Oil pocket bottom centre place has the draining hole, when unclamping the screw draining, left draining hole is so that the oil in the left chamber enters into the draining chamber, and right draining hole is so that the oil in the right chamber enters into the draining chamber, the oil of two chambers all focuses on the draining chamber and carries out draining, and draining easily and thoroughly.
In above-mentioned a kind of piano key cover falling retarder, be provided with O type circle between described screw and the housing.In use, the O type encloses sealing function, guarantees that oil can not leak between screw and housing.
In above-mentioned a kind of piano key cover falling retarder, have step and positioning convex on the wall of described chamber, described leakage of oil sheet be positioned on the step and the leakage of oil sheet on have the locating slot that is embedded in positioning convex.During installation, the locating slot of leakage of oil sheet is embedded in positioning convex, the installation location of leakage of oil sheet is convenient, and in use, the leakage of oil sheet can not rotate, and guarantees that the course of work is smooth.
In above-mentioned a kind of piano key cover falling retarder, offer pilot hole on having the locating convex block that is embedded in locating slot and seal pad on the described seal pad, described pressing plate has the reference column that is embedded in pilot hole.During installation, with seal pad locating convex block be embedded in the locating slot of leakage of oil sheet, again the reference column of pressing plate is embedded in seal pad in the pilot hole, the installation location of seal pad and pressing plate is convenient.
Compared with prior art, a kind of piano key cover falling retarder of providing of the utility model has the following advantages:
1, the slew page of this piano key cover falling retarder is thinner in the form of sheets, what therefore mount pad can be done is less, mount pad can not take oil pocket than large space like this, the scope that rotating shaft is rotated is large, so that the piano key cover opening angle is larger, rabbet slew page in addition between the first rib and the second rib, it is also comparatively convenient to install.
2, the connection and reasonable arrangement in the draining hole in this piano key cover falling retarder, left draining hole and right draining hole is so that draining is totally thorough.
3, it is convenient that the leakage of oil sheet in this piano key cover falling retarder, seal pad and pressing plate are installed the location, in use can not rotate, and guarantees that the course of work is smooth.
Description of drawings
Fig. 1 is the structural representation of facing of this piano key cover falling retarder.
Fig. 2 is the plan structure synoptic diagram of this piano key cover falling retarder.
Fig. 3 is the structure cut-open view in this piano key cover falling retarder A-A cross section.
Fig. 4 is the structure cut-open view in this piano key cover falling retarder B-B cross section.
Fig. 5 be in this piano key cover falling retarder seal pad structural representation.
Fig. 6 is the decomposition texture synoptic diagram of leakage of oil sheet, seal pad and pressing plate in this piano key cover falling retarder.
Among the figure, 1, rotating shaft; 2, housing; 3, left chamber; 4, right chamber; 5, mount pad; 5a, the first rib; 5b, the second rib; 6, scraping blade; 7, seal screw cap; 8, swivel arm; 9, leakage of oil sheet; 9a, skewed slot; 9b, oil leaking hole; 9c, locating slot; 10, slew page; 10a, connecting portion; 10b, hinge section; 11, seal pad; 11a, the logical oil groove of annular; 11b, locating convex block; 11c, pilot hole; 12, pressing plate; 12a, reference column; 13, exterior seal ring; 14, inner seal ring; 15, projection; 16, gland; 17, draining chamber; 18, screw; 19, left draining hole; 20, right draining hole; 21, O type circle.
Embodiment
Below be specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
Such as Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, this piano key cover falling retarder comprises rotating shaft 1 and has the housing 2 of oil pocket, have two mount pads 5 that oil pocket are divided into left chamber 3 and right chamber 4 in the housing 2, the inner of rotating shaft 1 is socketed with two scraping blades 6 and two scraping blades 6 lay respectively in left chamber 3 and the right chamber 4, the chamber wall of the outer rim of scraping blade 6 and left chamber 3 and right chamber 4 is conflicted, housing 2 seal screw cap 7 that has been threaded, the outer end of rotating shaft 1 passes seal screw cap 7 and is connected with a swivel arm 8, rotating shaft 1 is provided with the leakage of oil sheet 9 that is positioned at oil pocket, the skewed slot 9a that has the twice Central Symmetry and circumferentially extend on the end face that leakage of oil sheet 9 and mount pad 5 are conflicted, two skewed slot 9a lay respectively in left chamber 3 and the right chamber 4 and skewed slot 9a darker the closer to mount pad 5 its degree of depth, offer two centrosymmetric oil leaking hole 9b on the leakage of oil sheet 9, oil leaking hole 9b is connected near mount pad 5 and with skewed slot 9a.Two mount pads, 5 Central Symmetries and each mount pad 5 all have the first rib 5a and the second rib 5b, the second rib 5b is longer than the first rib 5a than the more close rotating shaft of the first rib 5a 1 side, interlocking has slew page 10 between the first rib 5a and the second rib 5b, slew page 10 has the connecting portion 10a that is column and the 10b of hinge section of arc-shaped flaky, connecting portion 10a is embedded between the first rib 5a and the second rib 5b, when slew page 10 is resisted against the first rib 5a, formed oil-gap between the 10b of hinge section and rotating shaft 1 side, when slew page 10 was resisted against the second rib 5b, the arcwall face of the 10b of hinge section contacted rotating shaft 1 side and forms sealing.
In order to guarantee sealing, as shown in Figure 3, be provided with seal pad 11 in the oil pocket, seal pad 11 be contacted with leakage of oil sheet 9 and seal pad 11 and be provided with fuel feeding by the logical oil groove 11a of the annular of oil leaking hole 9b, be provided with pressing plate 12 between seal screw cap 7 and the seal pad 11, be arranged with exterior seal ring 13 and inner seal ring 14 between seal pad 11 and pressing plate 12 on the seal pad 11, exterior seal ring 13 is contacted with the chamber wall of oil pocket, and inner seal ring 14 is contacted with rotating shaft 1 side.
In order to make rotating shaft 1 slow-roll stabilization, flexibly and draining totally thorough, such as Fig. 3, shown in Figure 4, the center of oil pocket bottom is provided with projection 15, rotating shaft 1 has the centralized positioning groove 9c with projection 15 couplings, be provided with gland 16 between projection 15 and the centralized positioning groove 9c, has draining chamber 17 between gland 16 and the projection 15, axially offer the draining hole that is connected with draining chamber 17 along projection 15 on the housing 2, a screw 18 is plugged in the draining hole, be provided with O type circle 21 between screw 18 and the housing 2, offer the left draining hole 19 that is communicated with left chamber 3 and draining chamber 17 and the right draining hole 20 that is communicated with right chamber 4 and draining chamber 17 in the rotating shaft 1 and on the gland 16.
In order to make leakage of oil sheet 9, it is convenient that seal pad 11 and pressing plate 12 are installed the location, such as Fig. 2, shown in Figure 6, have step and positioning convex on the wall of chamber, positioning convex quantity is two and is arranged symmetrically on the step, leakage of oil sheet 9 be positioned on the step and leakage of oil sheet 9 on have quantity and position locating slot 9c corresponding with positioning convex and that can be embedded in positioning convex, have quantity and position locating convex block 11b corresponding with locating slot 9c and that can be embedded in locating slot 9c on the seal pad 11, offer two pilot hole 11c that are arranged symmetrically with on seal pad 11 the other end, pressing plate 12 has quantity and position reference column 12a corresponding with pilot hole 11c and that can be embedded in pilot hole 11c.
Specific embodiment described herein only is to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has more used rotating shaft 1, housing 2, left chamber 3, right chamber 4, mount pad 5, the first rib 5a, the second rib 5b, scraping blade 6, seal screw cap 7, swivel arm 8, leakage of oil sheet 9, skewed slot 9a, oil leaking hole 9b, locating slot 9c, slew page 10, connecting portion 10a, the 10b of hinge section, seal pad 11, the logical oil groove 11a of annular, locating convex block 11b, pilot hole 11c, pressing plate 12, reference column 12a, exterior seal ring 13, inner seal ring 14, projection 15, gland 16, draining chamber 17, screw 18, left draining hole 19, right draining hole 20, O type circle 21 terms such as grade, but do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (10)
1. piano key cover falling retarder, comprise rotating shaft (1) and have the housing (2) of oil pocket, have two mount pads (5) that oil pocket are divided into left chamber (3) and right chamber (4) in the described housing (2), the inner of described rotating shaft (1) is socketed with two scraping blades (6) and two scraping blades (6) lay respectively in left chamber (3) and the right chamber (4), the chamber wall of the outer rim of scraping blade (6) and left chamber (3) and right chamber (4) is conflicted, described housing (2) seal screw cap (7) that has been threaded, the outer end of described rotating shaft (1) passes seal screw cap (7) and is connected with a swivel arm (8), described rotating shaft (1) is provided with the leakage of oil sheet (9) that is positioned at oil pocket, the skewed slot (9a) that has the twice Central Symmetry on the end face that described leakage of oil sheet (9) and mount pad (5) are conflicted and circumferentially extend, two skewed slots (9a) lay respectively at left chamber (3) and right chamber (4) is interior and skewed slot (9a) is darker the closer to its degree of depth of mount pad (5), it is characterized in that, described two mount pads (5) Central Symmetry and each mount pad (5) all have the first rib (5a) and the second rib (5b), described the second rib (5b) is longer than the first rib (5a) than the more close rotating shaft of the first rib (5a) (1) side, interlocking has slew page (10) between described the first rib (5a) and the second rib (5b), formed oil-gap between described slew page (10) and rotating shaft (1) side when slew page (10) is resisted against the first rib (5a), described slew page (10) contacts rotating shaft (1) side and forms sealing when slew page (10) is resisted against the second rib (5b).
2. a kind of piano key cover falling retarder according to claim 1, it is characterized in that, described slew page (10) has the connecting portion (10a) that is column and the hinge section (10b) of arc-shaped flaky, described connecting portion (10a) is embedded between the first rib (5a) and the second rib (5b), and the arcwall face of described hinge section (10b) can contact mutually with rotating shaft (1) side.
3. a kind of piano key cover falling retarder according to claim 1 is characterized in that, offers two centrosymmetric oil leaking holes (9b) on the described leakage of oil sheet (9), and described oil leaking hole (9b) is connected near mount pad (5) and with skewed slot (9a).
4. a kind of piano key cover falling retarder according to claim 3, it is characterized in that, be provided with seal pad (11) in the described oil pocket, described seal pad (11) is contacted with leakage of oil sheet (9) and seal pad (11) is provided with fuel feeding by the logical oil groove (11a) of the annular of oil leaking hole (9b).
5. a kind of piano key cover falling retarder according to claim 4, it is characterized in that, be provided with pressing plate (12) between described seal screw cap (7) and the seal pad (11), be arranged with the exterior seal ring (13) and the inner seal ring (14) that are positioned between seal pad (11) and the pressing plate (12) on the described seal pad (11), described exterior seal ring (13) is contacted with the chamber wall of oil pocket, and described inner seal ring (14) is contacted with rotating shaft (1) side.
6. according to claim 1 and 2 or 3 or 4 or 5 described a kind of piano key cover falling retarders, it is characterized in that, the center of described oil pocket bottom is provided with projection (15), rotating shaft (1) has the centralized positioning groove (9c) with projection (15) coupling, is provided with gland (16) between described projection (15) and the centralized positioning groove (9c).
7. a kind of piano key cover falling retarder according to claim 6, it is characterized in that, has draining chamber (17) between described gland (16) and the projection (15), described housing (2) is upper axially to offer the draining hole that is connected with draining chamber (17) along projection (15), a screw (18) is plugged in the draining hole, offers the left draining hole (19) that is communicated with left chamber (3) and draining chamber (17) and the right draining hole (20) that is communicated with right chamber (4) and draining chamber (17) in the described rotating shaft (1) and on the gland (16).
8. a kind of piano key cover falling retarder according to claim 7 is characterized in that, is provided with O type circle (21) between described screw (18) and the housing (2).
9. according to claim 1 and 2 or 3 or 4 or 5 described a kind of piano key cover falling retarders, it is characterized in that, have step and positioning convex on the wall of described chamber, described leakage of oil sheet (9) be positioned on the step and leakage of oil sheet (9) on have the locating slot (9c) that is embedded in positioning convex.
10. a kind of piano key cover falling retarder according to claim 9, it is characterized in that, have on the described seal pad (11) on the locating convex block (11b) that is embedded in locating slot (9c) and the seal pad (11) and offer pilot hole (11c), described pressing plate (12) has the reference column (12a) that is embedded in pilot hole (11c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294484 CN202662268U (en) | 2012-06-20 | 2012-06-20 | Piano key cover descending device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294484 CN202662268U (en) | 2012-06-20 | 2012-06-20 | Piano key cover descending device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202662268U true CN202662268U (en) | 2013-01-09 |
Family
ID=47457156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220294484 Expired - Lifetime CN202662268U (en) | 2012-06-20 | 2012-06-20 | Piano key cover descending device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202662268U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960665A (en) * | 2017-05-23 | 2017-07-18 | 宁波市五角阻尼股份有限公司 | A kind of piano lifesaving hydraulic descent control device |
| CN109559926A (en) * | 2019-01-17 | 2019-04-02 | 佛山市顺德区源峰电子有限公司 | A kind of integrated optimization architecture of key switch |
-
2012
- 2012-06-20 CN CN 201220294484 patent/CN202662268U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960665A (en) * | 2017-05-23 | 2017-07-18 | 宁波市五角阻尼股份有限公司 | A kind of piano lifesaving hydraulic descent control device |
| CN109559926A (en) * | 2019-01-17 | 2019-04-02 | 佛山市顺德区源峰电子有限公司 | A kind of integrated optimization architecture of key switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100937780B1 (en) | Oil damper to used cam | |
| KR101361926B1 (en) | Furniture hinge with damping device | |
| JP3153622U (en) | Interference module and hinge device using the same | |
| CN202662268U (en) | Piano key cover descending device | |
| WO2011025251A3 (en) | Automatic door closure unit | |
| CA2570543A1 (en) | Differential housing | |
| US9175780B2 (en) | Button switch three-way valve | |
| CN103527700A (en) | A damping device | |
| CN108105319A (en) | A kind of adjustable damper of damping | |
| CN201411997Y (en) | Hinge | |
| CN108606709B (en) | Compact standing damping device | |
| CN109578508A (en) | A kind of damping mechanism with layback mute function | |
| CN204526750U (en) | The secondary seat structure of a kind of car visor | |
| CN103485641B (en) | Double-vane damper | |
| CN208957938U (en) | A kind of stand-type damping unit of compact | |
| JP2013002539A (en) | Rotary damper | |
| CN209026229U (en) | A kind of pressing divides ceramic water spool | |
| CN108577647B (en) | Damper | |
| CN110005753B (en) | Rotary damper | |
| CN213758034U (en) | Abnormal sound prevention structure for rotating shaft of toilet cover | |
| CN205368782U (en) | Washing machine flip mechanism of skidding | |
| CN201126007Y (en) | Locomotive gear box oiling cup cover apparatus | |
| CN214617660U (en) | Improved damper | |
| CN201439802U (en) | Pivot device with stop function | |
| CN208816593U (en) | A kind of unidirectional damper with clutch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |