Lubricating oil supply device

Abstract

The utility model provides a device for uniformly supplying lubricating oil to a keyboard cover, which comprises a compressible chamber, a plurality of oil outlet pipelines communicated with the bottom of the compressible chamber, an oil control valve, a main pipeline communicated with the oil control valve, M first-stage sub-pipelines communicated with the main pipeline, M * I second-stage sub-pipelines, M * I * K third-stage sub-pipelines and M * I * K * N manifold pipelines, wherein M, I, K and N are integers greater than 1. And each first-stage sub-pipeline corresponds to I second-stage sub-pipelines and is communicated with the corresponding second-stage sub-pipelines. And each second-stage sub-pipeline corresponds to K third-stage sub-pipelines and is communicated with the corresponding third-stage sub-pipelines. And each third-stage sub-pipeline corresponds to N branch pipelines and is communicated with the corresponding branch pipelines. Each manifold path communicates with the top of the compressible chamber with a respective oil inlet. And the distances from the oil inlets to the tail end of the main pipeline are equal.

Description

Technical Field

[0001] The utility model relates to a device for supplying lubricating oil to a keyboard cover, in particular to a device for evenly supplying lubricating oil to the keyboard cover. Background Art

[0002] In order to reduce the noise generated by the friction of the keyboard moving parts and increase the lifespan of some mechanical keyboards, multiple droplets of paste-like lubricant are applied to the inner wall of the keyhole of the keyboard cover.

[0003] Take the Crater keyboard as an example of a mechanical keyboard, see Figure 1 and Figure 2 , Figure 1 A keyboard cover 1 showing a crater keyboard, Figure 2 for Figure 1 A partial top view of the keyboard cover 1. The keyboard cover 1 of the Crater keyboard features multiple elevated keyholes 10. During the keypress and reset process, the guide posts attached to the bottom of the keycaps rub against the inner sidewalls 102 of the keyholes 10. Therefore, at least one oiling area 104 is defined on the inner sidewalls 102 of the keyholes 10.

[0004] See also Figure 3 and Figure 4 , Figure 3 The device 2 for supplying lubricating oil in the prior art is shown, which is used to apply droplets of lubricating oil paste to the oiling position 104. Figure 4 for Figure 2 The cross-sectional view of the middle keyboard cover 1 along AA, Figure 4 Part of the components of the device 2 for supplying lubricating oil in the prior art is also shown.

[0005] like Figure 3 As shown, a prior art lubricating oil supply device 2 includes a compressible chamber 20, multiple oil outlet lines 22, an oil control valve 24, and a main line 26. The multiple oil outlet lines 22 communicate with the bottom 204 of the compressible chamber 20. Each oil outlet line 22 has an oil outlet 222, each oil outlet 222 corresponding to an oiling position 104. The oil control valve 24 communicates with the top 202 of the compressible chamber 20 via the main line 26. The oil control valve 24 also communicates with an oil supply line 28, allowing lubricating oil to flow to the oil control valve 24 through the oil supply line 28.

[0006] The oil control valve 24 draws a predetermined amount of lubricating oil at a time and flows it into the compressible chamber 20 through the main line 26 . The compressible chamber 20 then squeezes the lubricating oil from the multiple oil outlets 202 to deposit lubricating oil droplets on each oiling position 104 .

[0007] However, the keyboard cover 1 of a general volcano keyboard has 110 keyholes 10, if 6 oiling locations 104 are defined on the inner side wall 102 of each keyhole 10, there are totally 660 oiling locations 104, and the lubricating oil supplying device 2 must provide 660 oil outlets 222. The compressible chamber 20 cannot directly divide the existing chamber into multiple zones in the case of a relatively dense distribution of the oil outlet pipelines 22. Therefore, the lubricating oil supplying device 2 must be squeezed out of the lubricating oil in the compressible chamber 20 from multiple oil outlets 202 of the oil outlet pipelines 22 at the same time. However, the lubricating oil has a high viscosity, and the lubricating oil in the compressible chamber 20 flows slowly, resulting in that the lubricating oil has been squeezed out of some oil outlets 202 of some oil outlet pipelines 22 while there is no lubricating oil in some other oil outlets 202 of some other oil outlet pipelines 22. Therefore, in practice, the lubricating oil supplying device 2 of the prior art is difficult to point the paste-like lubricating oil droplets on all the oiling locations 104 on the inner side walls 102 of all the keyholes 10 of the keyboard cover 1, and cannot uniformly supply the lubricating oil to the keyboard cover.

[0008] In addition, the lubricating oil supplying device 2 of the prior art must be kept in a manner that the oil outlets 202 face upwards, and is moved from below to above to approach the keyboard cover 1 to point the paste-like lubricating oil droplets on the oiling locations 104, so as to suck back the lubricating oil about to overflow and avoid excessive lubricating oil from overflowing from the oil outlets 202.

[0009] In addition, when the lubricating oil supplying device 2 of the prior art is used, the keyboard cover 1 must not be assembled with other components and elements of the keyboard, so that each oil outlet pipeline 22 can extend into the corresponding keyhole 10. However, the keyboard cover 1 will be subjected to collision and vibration in the subsequent assembly process, resulting in that the paste-like lubricating oil droplets that have been pointed are displaced or even fall off.

[0010] Therefore, it is necessary to design a new lubricating oil supplying device to uniformly supply the lubricating oil to the keyboard cover and overcome the defects in the prior art. Content of the Utility Model

[0011] The utility model discloses a lubricating oil supplying device for a keyboard cover, which can point paste-like lubricating oil droplets on all the oiling locations on the inner side walls of all the keyholes of the keyboard cover uniformly, and can move from above to below to approach the keyboard cover in a manner that the oil outlets of the oil outlet pipelines face downwards to point the paste-like lubricating oil droplets on all the oiling locations of the keyboard cover.

[0012] To achieve the above-mentioned purpose, the utility model provides a lubricating oil supplying device suitable for supplying lubricating oil to a keyboard cover, wherein the keyboard cover has a plurality of keyholes, and at least one oiling location is defined on the inner side wall of each keyhole, and the lubricating oil supplying device comprises:

[0013] a compressible chamber having a top and a bottom;

[0014] a plurality of oil outlet lines, each of which is connected to the bottom of the compressible chamber, each of the oil outlet lines has an oil outlet, and each of the oil outlets corresponds to an oiling position;

[0015] an oil control valve;

[0016] a main line connected to the oil control valve;

[0017] a plurality of first sub-lines, each of which is connected to an end of the main line;

[0018] a plurality of second sub-lines, each of which is connected to an end of each of the first sub-lines;

[0019] a plurality of third sub-lines, each of which is connected to an end of each of the second sub-lines; and

[0020] a plurality of manifold lines, each of which is connected to an end of each of the third sub-lines, each of the manifold lines has an oil inlet, and each of the manifold lines is connected to the top of the compressible chamber through the oil inlet, and the distance from each of the oil inlets to the end of the main line is equal.

[0021] The device for supplying lubricating oil is moved so that each of the oil outlets is adjacent to its corresponding oiling position, a predetermined amount of the lubricating oil is controlled to flow into the main line through the oil control valve, the lubricating oil sequentially flows through each of the first sub-lines, each of the second sub-lines, and each of the manifold lines, and then flows into the compressible chamber, the compressible chamber then extrudes the lubricating oil from the plurality of oil outlets, and then forms a plurality of oil droplets on each of the oiling positions.

[0022] Preferably, the first sub-lines have M, which is a first integer greater than 1, ends connected to the first end of the main line.

[0023] The second sub-lines have MxI, which is a second integer greater than 1, and each of the first sub-lines corresponds to I of the second sub-lines, and each of the second sub-lines is connected to the second end of its corresponding first sub-line.

[0024] The third sub-lines have MxIxK, which is a third integer greater than 1, and each of the second sub-lines corresponds to K of the third sub-lines, and each of the third sub-lines is connected to the third end of its corresponding second sub-line.

[0025] The manifold lines have MxIxKxN, which is a fourth integer greater than 1, and each of the third sub-lines corresponds to N of the manifold lines, and each of the manifold lines is connected to the fourth end of its corresponding third sub-line.

[0026] Preferably, the MxIxKxN oil inlets of the MxIxKxN manifold lines are uniformly arranged on the top.

[0027] Preferably, the micro-droplets at each oiling position point are equal in amount.

[0028] Preferably, the viscosity of the lubricating oil is equal to or greater than 10,000 cps.

[0029] Preferably, the inner side wall of each keyhole has at least one recess, each recess corresponding to an oiling position and being formed at its corresponding oiling position.

[0030] Preferably, a lubricating oil supplying device is adapted to supply lubricating oil to a keyboard cover, the keyboard cover having a plurality of keyholes and a long side, the plurality of keyholes being divided into J zones along the long side, J being an integer greater than 1, wherein the lubricating oil supplying device corresponds to the plurality of keyholes in one of the J zones, the inner side wall of each keyhole in the one zone defining at least one oiling position, the lubricating oil supplying device comprising:

[0031] a compressible chamber having a top and a bottom;

[0032] a plurality of oil outlet conduits communicating with the bottom of the compressible chamber, each oil outlet conduit having an oil outlet, each oil outlet corresponding to an oiling position;

[0033] an oil control valve; and

[0034] a main conduit communicating with the oil control valve and the top of the compressible chamber;

[0035] wherein when the lubricating oil supplying device is moved such that each oil outlet is adjacent to its corresponding oiling position, a predetermined amount of the lubricating oil is controlled by the oil control valve to flow into the main conduit and then into the compressible chamber, the compressible chamber then forces the lubricating oil out of the plurality of oil outlets and onto each oiling position point as a micro-droplet of lubricating oil.

[0036] Preferably, the micro-droplets at each oiling position point are equal in amount.

[0037] Preferably, the viscosity of the lubricating oil is equal to or greater than 10,000 cps.

[0038] Preferably, the inner side wall of each keyhole has at least one recess, each recess corresponding to an oiling position and being formed at its corresponding oiling position.

[0039] Unlike prior art lubricating oil supplying devices, the lubricating oil supplying device of the present application is capable of uniformly supplying lubricating oil to a keyboard cover, i.e. capable of causing a micro-droplet of lubricating oil to be applied to each oiling position on the inner side wall of each keyhole of the keyboard cover. Furthermore, the lubricating oil supplying device of the present application is capable of moving towards the keyboard cover from above with the oil outlet of the oil outlet conduit facing downwards and then applying a micro-droplet of lubricating oil to each oiling position on the keyboard cover. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 This is the appearance of the keyboard cover.

[0041] Figure 2 for Figure 1 A partial top view of the center keyboard cover.

[0042] Figure 3 This is an external view of a device for supplying lubricating oil in the prior art.

[0043] Figure 4 for Figure 2 Cross-sectional view of the middle keyboard cover along line AA.

[0044] Figure 5 This is an external view of a lubricating oil supply device according to a first preferred embodiment of the present invention.

[0045] Figure 6 for Figure 1 Another partial sectional view of the middle keyboard cover.

[0046] Figure 7 This is the appearance view of another keyboard cover.

[0047] Figure 8 This is an external view of a lubricating oil supply device according to a second preferred embodiment of the present invention.

[0048] Figure 9 for Figure 7 Partial cross-sectional view of the middle keyboard cover. DETAILED DESCRIPTION

[0049] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0050] Certain terms are used throughout the specification and claims to refer to specific components. Those skilled in the art will understand that manufacturers may use different terms to refer to the same component. This specification and claims do not distinguish components by name, but rather by their functional differences. Throughout the specification and claims, the term "including" is open-ended and should be interpreted as meaning "including, but not limited to."

[0051] See also Figure 5 and Figure 6 , these figures schematically depict a lubricating oil supplying device 3 according to a first preferred embodiment of the present invention. The lubricating oil supplying device 3 according to the first preferred embodiment of the present invention is used to uniformly supply lubricating oil to the keyboard cover 1. Figure 5To schematically illustrate the device 3 for supplying lubricating oil of the first preferred embodiment of the present utility model in a top view. Figure 6 To Figure 1 Another partial cross-sectional view of the keyboard cover 1 is shown. And in Figure 6 Also shown are parts of the device 3 for supplying lubricating oil according to the first preferred embodiment of the present utility model.

[0052] As Figure 5 and Figure 6 shown, and referring to Figure 1 and Figure 2 , the keyboard cover 1 has a plurality of key holes 10. At least one oiling position 104 is defined on each respective inner side wall 102 of each key hole 10. Figure 2 The example shown presents 3 out of 6 oiling positions 104. The device 3 for supplying lubricating oil of the first preferred embodiment of the present utility model comprises a compressible chamber 30, a plurality of oil outlet conduits 31, an oil control valve 32, a main conduit 33, M primary sub-conduits 34, MxI secondary sub-conduits 35, MxIxK tertiary sub-conduits 36, and MxIxKxN manifold conduits 37, where M is a first integer greater than 1, I is a second integer greater than 1, K is a third integer greater than 1, and N is a fourth integer greater than 1.

[0053] The compressible chamber 30 has a top portion 302 and a bottom portion 304. The plurality of oil outlet conduits 31 are in communication with the bottom portion 304 of the compressible chamber 30. Each oil outlet conduit 31 has a respective oil outlet port 312. Each oil outlet port 312 corresponds to an oiling position 104. The compressible chamber 30 can be divided into upper and lower cover bodies that are relatively movable, but the present utility model is not limited thereto. The upper and lower cover bodies of the compressible chamber 30 must be sealed by a sealing strip, and the chamber wall must have a certain wall thickness. The main conduit 33 is in communication with the oil control valve 32. The oil control valve 32 is also in communication with an oil supply conduit 38, through which lubricating oil can flow to the oil control valve 32.

[0054] The M primary sub-conduits 34 are respectively in communication with a first end 332 of the main conduit 33. Each primary sub-conduit 34 corresponds to I secondary sub-conduits 35 out of the MxI secondary sub-conduits 35. Each secondary sub-conduit 35 is in communication with a respective second end 342 of its corresponding primary sub-conduit 34. Each secondary sub-conduit 35 corresponds to K tertiary sub-conduits 36 out of the MxIxK tertiary sub-conduits 36. Each tertiary sub-conduit 36 is in communication with a respective third end 352 of its corresponding secondary sub-conduit 35. Each tertiary sub-conduit 36 corresponds to N manifold conduits 37 out of the MxIxKxN manifold conduits 37. Each manifold conduit 37 is in communication with a respective fourth end 362 of its corresponding tertiary sub-conduit 36. In Figure 5In the example of the lubricating oil supplying device 3 of the first preferred embodiment of the present application, two first sub-pipes 34 are shown, four second sub-pipes 35 are shown, eight third sub-pipes 36 are shown, and sixteen manifold pipes 37 are shown. Each manifold pipe 37 has a respective oil inlet 372 and communicates with the top 302 of the compressible chamber 30 at the respective oil inlet 372. In particular, each oil inlet 372 is equidistant from the first end 332 of the main pipe 33.

[0055] When the lubricating oil supplying device 3 of the first preferred embodiment of the present application is used to supply lubricating oil, the lubricating oil supplying device 3 is moved so that each oil outlet 312 is adjacent to its corresponding oiling position 104. A predetermined amount of lubricating oil is controlled by the oil control valve 32 to flow into the main pipe 33. The lubricating oil flows through each first sub-pipe 34, each second sub-pipe 35, each manifold pipe 37, and then evenly flows into the compressible chamber 30. The compressible chamber 30 then extrudes the lubricating oil from the plurality of oil outlets 312, and then dots the lubricating oil onto each oiling position 104.

[0056] In particular, the lubricating oil supplying device 3 of the first preferred embodiment of the present application can be moved from above to below the keyboard cover 1 with the oil outlets 312 of the oil outlet pipe 31 facing downwards, and then dots the lubricating oil onto each oiling position 104 of the keyboard cover 1, as shown in Figure 6 At this time, the keyboard cover 1 has been assembled with other components and elements of the keyboard, and only the keyholes 10 are exposed. After the lubricating oil is dotted onto each oiling position 104 of the keyboard cover 1, the guide posts on the keyboard cover 1 can then be inserted into the keyholes 10, so that the lubricating oil fills the gap between the guide posts and the inner side walls 102 of the keyholes 10. In this way, the keyboard cover 1 will not be subjected to collisions and vibrations during the subsequent assembly process, which can cause the lubricating oil that has been dotted onto each oiling position 104 to be displaced or even to fall off.

[0057] In one embodiment, the MxIxKxN oil inlets 372 of the MxIxKxN manifold pipes 37 are evenly arranged on the top 302 of the compressible chamber 30.

[0058] In one embodiment, the amount of lubricating oil dotted onto each oiling position 104 is equal.

[0059] In one embodiment, the viscosity of the lubricating oil is equal to or greater than 10,000 cps.

[0060] In one embodiment, each inner side wall 102 of each keyhole 10 has at least one recess. Each recess corresponds to an oiling position 104 and is formed at the corresponding oiling position 104.

[0061] Referring to Figure 7 , Figure 8 and Figure 9 , the figures schematically depict a lubricating oil supply device 5 according to a second preferred embodiment of the present application. Figure 7 Another keyboard cover 4 is schematically depicted in an exterior view. Figure 8 A lubricating oil supply device 5 according to a second preferred embodiment of the present application is schematically depicted in a top view. Figure 9 A Figure 7 partial cross-sectional view of the keyboard cover 4 is shown. Also shown in Figure 9 is a partial component of a lubricating oil supply device 5 according to a second preferred embodiment of the present application.

[0062] As shown in Figure 7 and Figure 9 , the keyboard cover 4 has a plurality of key holes 40 and a long side 42. The plurality of key holes 40 are divided into J zones along the long side 42, where J is an integer greater than 1. In the example shown in Figure 7 , the plurality of key holes 40 are divided into 4 zones (411, 412, 413 and 414) along the long side 42.

[0063] As shown in Figure 8 , the device 5 according to the second preferred embodiment of the present application corresponds to the plurality of key holes 40 in one of the J zones. Hereinafter, the plurality of key holes 40 in zone 411 according to the device 5 of the second preferred embodiment of the present application will be taken as an example for illustration. At least one oiling position 404 is defined on the respective inner side wall 402 of each of the plurality of key holes 40 in the zone 411.

[0064] The device 5 according to the second preferred embodiment of the present application comprises a compressible chamber 50, a plurality of oil outlet conduits 52, an oil control valve 54 and a main conduit 56.

[0065] The compressible chamber 50 has a top portion 502 and a bottom portion 504. The plurality of oil outlet conduits 52 are in communication with the bottom portion 504 of the compressible chamber 50. Each of the oil outlet conduits 52 has a respective oil outlet port 522. Each of the oil outlet ports 522 corresponds to an oiling position 404. The compressible chamber 50 can be divided into upper and lower cover bodies that are relatively movable, but the present application is not limited thereto. The upper and lower cover bodies of the compressible chamber 50 must be sealed by a sealing strip, and the chamber wall must have a certain wall thickness. The main conduit 56 is in communication with the oil control valve 54 and the top portion 502 of the compressible chamber 50. The oil control valve 54 is also in communication with an oil supply conduit 58, through which lubricating oil can flow to the oil control valve 54.

[0066] When the device 5 supplies lubricating oil according to the second preferred embodiment of the present application, the device 5 supplying lubricating oil is moved, and the movement causes each oil outlet 522 to be adjacent to its corresponding oiling position 404. The predetermined amount of lubricating oil is controlled by the oil control valve 54 to flow into the main pipeline 56 and then uniformly into the compressible chamber 50. The compressible chamber 50 then extrudes the lubricating oil from the plurality of oil outlets 522, and then dots the lubricating oil droplets on each oiling position 404.

[0067] Compared with the scheme in the prior art device 2 supplying lubricating oil, in which 660 oil outlets 222 are arranged in a relatively dense manner to correspond to all 660 oiling positions 104 on the keyboard cover, the oil outlet 522 in the device 5 supplying lubricating oil according to the present application corresponds to the plurality of key holes 40 in one area of the keyboard cover 4, and the movement of the device 5 supplying lubricating oil dots the lubricating oil droplets on the oiling positions 404 in one area of the keyboard cover 4; in this way, the device 5 supplying lubricating oil can realize that the predetermined amount of lubricating oil is controlled by the oil control valve 54 to flow into the main pipeline 56 and then uniformly into the smaller compressible chamber 50.

[0068] In particular, the device 5 supplying lubricating oil according to the second preferred embodiment of the present application can move from top to bottom to approach the keyboard cover 4 in a manner that the oil outlet 522 of the oil outlet pipeline 52 faces downward, and then dots the lubricating oil droplets on all the oiling positions 404 of the keyboard cover 4, as shown in Figure 9 At this time, the keyboard cover 4 has been assembled with other components and elements of the keyboard, and only the key holes 40 are exposed. After the lubricating oil droplets are dotted on all the oiling positions 404 of the keyboard cover 4, the guide posts on the bottom of the keycaps can then be inserted into the key holes 40, so that the lubricating oil fills the gap between the guide posts and the inner side wall 402 of the key holes 40. In this way, the keyboard cover 4 will not be subjected to collision and vibration during the subsequent assembly process when the device supplying lubricating oil according to the prior art is used, and the problems such as displacement or even falling off of the lubricating oil droplets that have been dotted will not occur.

[0069] In one embodiment, the droplets dotted on each oiling position 404 are equal in amount.

[0070] In one embodiment, the viscosity of the lubricating oil is equal to or greater than 10,000 cps.

[0071] In one embodiment, each inner side wall 404 of each key hole 40 has at least one recess. Each recess corresponds to an oiling position 404 and is formed at the corresponding oiling position 404.

[0072] Through the above detailed description of the utility model, it can be clearly understood that the device for supplying lubricating oil can uniformly supply lubricating oil to the keyboard cover, that is, can make all the key holes of the keyboard cover have all the oiling positions on the inner side wall dotted with paste-like lubricating oil droplets. Moreover, the device for supplying lubricating oil can move from top to bottom to approach the keyboard cover in a manner that the oil outlet of the oil outlet pipeline faces downward, and then dot all the oiling positions of the keyboard cover with paste-like lubricating oil droplets.

[0073] The utility model has been described by the above related embodiments, however, the above embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and decorations made without departing from the spirit and scope of the utility model are all within the scope of patent protection of the utility model.

Claims

1. A device for supplying lubricating oil, adapted to supply a keyboard cover with lubricating oil, wherein the keyboard cover has a plurality of key holes, and at least one oiling position is defined on the inner side wall of each key hole, characterized in that, The lubricating oil supply device comprises: a compressible chamber having a top and a bottom; a plurality of oil outlet pipes connected to the bottom of the compressible chamber, each of the oil outlet pipes having an oil outlet, each of the oil outlets corresponding to an oiling position; an oil control valve; a main pipe connected to the oil control valve; a plurality of first sub-pipes connected to the end of the main pipe; a plurality of second sub-pipes connected to the end of each of the first sub-pipes; a plurality of third sub-pipes connected to the end of each of the second sub-pipes; and a plurality of manifold pipes connected to the end of each of the third sub-pipes, each of the manifold pipes having an oil inlet connected to the top of the compressible chamber, the distance from each of the oil inlets to the end of the main pipe being equal; wherein the lubricating oil supply device is moved so that each of the oil outlets is adjacent to its corresponding oiling position, a predetermined amount of the lubricating oil is controlled by the oil control valve to flow into the main pipe, the lubricating oil flows through each of the first sub-pipes, each of the second sub-pipes, each of the manifold pipes in turn, and then flows into the compressible chamber, the compressible chamber then extrudes the lubricating oil from the plurality of oil outlets, thereby forming lubricating oil droplets at each of the oiling positions.

2. A device for supplying lubricating oil as claimed in claim 1, characterized in that The first sub-pipes have M, which are connected to the first end of the main pipe, M being a first integer greater than 1; The second sub-pipes have M×I, I being a second integer greater than 1, each of the first sub-pipes corresponding to I of the second sub-pipes, each of the second sub-pipes being connected to the second end of its corresponding first sub-pipe; The third sub-pipes have M×I×K, K being a third integer greater than 1, each of the second sub-pipes corresponding to K of the third sub-pipes, each of the third sub-pipes being connected to the third end of its corresponding second sub-pipe; and The manifold pipes have M×I×K×N, N being a fourth integer greater than 1, each of the third sub-pipes corresponding to N of the manifold pipes, each of the manifold pipes being connected to the fourth end of its corresponding third sub-pipe.

3. A device for supplying lubricating oil as claimed in claim 2, characterized in that The M×I×K×N oil inlets of the M×I×K×N manifold pipes are evenly arranged on the top.

4. The device for supplying lubricating oil according to claim 1, wherein The droplets at each of the oiling positions are equal in amount.

5. The device for supplying lubricating oil according to claim 1, wherein The viscosity of the lubricating oil is equal to or greater than 10,000 cps.

6. The device for supplying lubricating oil according to claim 1, wherein The inner side wall of each of the keyholes has at least one recess, each of the recesses corresponding to an oiling position and being formed at the corresponding oiling position.

7. A device for supplying lubricating oil adapted to supply lubricating oil to a keyboard cover having a plurality of key holes and a long side, the plurality of key holes being divided into J regions along the long side, J being an integer greater than 1, the device for supplying lubricating oil corresponding to the plurality of key holes of one of the J regions, at least one oil application position being defined on an inner side wall of each of the key holes in the one region, characterized in that, The lubricating oil supply device comprises: a compressible chamber having a top and a bottom; a plurality of oil outlet pipes connected to the bottom of the compressible chamber, each of the oil outlet pipes having an oil outlet, each of the oil outlets corresponding to an oiling position; an oil control valve; and a main pipe connected to the oil control valve and the top of the compressible chamber; wherein the lubricating oil supply device is moved so that each of the oil outlets is adjacent to its corresponding oiling position, a predetermined amount of the lubricating oil is controlled by the oil control valve to flow into the main pipe and then into the compressible chamber, the compressible chamber then extrudes the lubricating oil from the plurality of oil outlets, thereby forming lubricating oil droplets at each of the oiling positions.

8. A device for supplying lubricating oil as claimed in claim 7, characterized in that The droplets at each of the oiling positions are equal in amount.

9. The device for supplying lubricating oil according to claim 7, wherein The viscosity of the lubricating oil is equal to or greater than 10,000 cps.

10. The device for supplying lubricating oil according to claim 7, wherein The inner side wall of each keyhole has at least one recess, each recess corresponding to an oiling position and being formed at the corresponding oiling position.

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