A satellite shaft assembly and a button

Abstract

The present invention discloses a satellite shaft assembly and a button. The satellite shaft assembly includes two satellite shaft cores and a balance rod. Each satellite shaft core has a plug-in groove. The balance rod has two plug rods located on both sides respectively and a connecting rod connected between the rear ends of the two plug rods. The front end of the plug rod extends into the plug-in groove. The plug-in groove is a blind hole with an open rear end. The front end of the plug rod has an arc rolling surface. The front end of the plug rod forms a rolling fit with the inner top surface and the inner bottom surface of the plug-in groove through the arc rolling surface. The lower end of the arc rolling surface protrudes downward beyond the lower side surface of the plug rod. In this way, through the rolling fit mode, it is beneficial to improve abnormal noise. At the same time, the plug rod can effectively avoid the parting surface of the satellite shaft core. The gap between the plug-in groove and the plug rod can be controlled within 0.05 mm, further reducing or even avoiding the sound generated by the balance rod hitting the satellite shaft hole. Moreover, with the structure of this satellite shaft assembly, it can be considered to cancel the oiling process and still meet the requirements of low abnormal noise or even no abnormal noise, saving man-hours and improving the yield rate.

Description

Technical Field

[0001] The present invention relates to the technical field of keys, and in particular to a satellite shaft assembly and a key. Background Art

[0002] As Figure 9 and Figure 10 shown, the existing satellite shaft assembly includes two satellite shaft cores 1 and a balance bar 2. Each of the satellite shaft cores 1 has a socket groove 5. The balance bar 2 has two insertion rods 3 located on both sides respectively and a connecting rod 4 connected between the rear ends of the two insertion rods 3. The front end of the insertion rod 3 extends into the socket groove 5. When in use, during the movement of the balance bar 2 in the hole of the satellite shaft core 1, due to the precision problem of the hole, an assembly gap will be formed with the balance bar 2. When the keycap is quickly tapped, the insertion rod 3 of the balance bar 2 will hit the satellite shaft hole and make a sound. Compared with the tapping sound of the shaft itself, it is a noise (also called abnormal sound). Moreover, the burr on the parting surface of the satellite shaft core 1 is just at the position of the satellite shaft moving clamping point 7, and the moving gap will be affected by the burr, resulting in a large gap between the socket groove 5 and the insertion rod 3. At present, the solution to eliminate the impact sound is to apply joint oil. This oil application process is difficult to operate and has a low yield. Moreover, the oil application position 6 of the satellite shaft core is a through hole, and the lubricating grease will disperse in the through hole, with poor controllability. If the amount of oil is less, there will be insufficient lubrication, and if the amount of oil is more, it will overflow and cause a sticky feel.

[0003] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present invention is to provide a satellite shaft assembly and a key. Through a rolling fit method, it is beneficial to improve abnormal sound. At the same time, the insertion rod can effectively avoid the parting surface of the satellite shaft core, and the gap between the socket groove and the insertion rod can be controlled within 0.05 mm, further reducing or even avoiding the sound of the balance bar hitting the satellite shaft hole. Moreover, with the structure of this satellite shaft assembly, it can be considered to cancel the oil application process and still meet the requirements of low abnormal sound or even no abnormal sound, saving man-hours and improving the yield.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A satellite shaft assembly includes two satellite shaft cores and a balance bar. Each of the satellite shaft cores has a socket groove. The balance bar has two insertion rods located on both sides respectively and a connecting rod connected between the rear ends of the two insertion rods. The front end of the insertion rod extends into the socket groove. The socket groove is a blind hole with an open rear end. The front end of the insertion rod has an arc rolling surface. The front end of the insertion rod forms a rolling fit with the inner top surface and the inner bottom surface of the socket groove through the arc rolling surface. The lower end of the arc rolling surface protrudes downward beyond the lower side surface of the insertion rod.

[0007] As a preferred solution, the arc rolling surface has an arc rolling track on the vertical section in the front-back direction. The arc rolling track is a major arc. One end of the arc rolling track is connected to the top of the front end of the insertion rod, and the other end of the arc rolling track is connected to the bottom of the front end of the insertion rod.

[0008] As a preferred solution, grease is provided at the front end inside the insertion slot.

[0009] As a preferred solution, the vertical section of the insertion rod in the left-right direction is rectangular. The insertion rod has a top surface, a bottom surface, a left side surface and a right side surface. The arc rolling surface extends forward in an arc along the top of the front end of the insertion rod, then extends downward in an arc, and then extends backward in an arc to connect to the bottom of the front end of the insertion rod.

[0010] As a preferred solution, the left and right ends of the connecting rod respectively extend beyond the insertion rods on both sides.

[0011] As a preferred solution, the outer surface of the insertion rod is a plastic surface.

[0012] As a preferred solution, the satellite shaft assembly further includes two satellite shaft seats. The satellite shaft core is installed in the satellite shaft seats. A rotation groove is provided at the rear end of the satellite shaft seat. A rotation part is connected to the rear end of the insertion rod. The rotation part is rotatably arranged in the rotation groove.

[0013] As a preferred solution, the insertion rod and the rotation part are an integral plastic part; the outer surface of the connecting rod is a plastic surface, and a reinforcing metal wire is embedded inside the connecting rod.

[0014] As a preferred solution, the front end of the inner bottom surface of the insertion slot is connected with an avoidance inclined surface extending obliquely downward forward. A gap is maintained between the lower side surface of the insertion rod and the inner bottom surface and the avoidance inclined surface of the insertion slot.

[0015] A button includes a button body, and the button body has a satellite shaft assembly as described in any one of the preceding items.

[0016] The present invention has obvious advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly designs the insertion slot as a blind hole, and the front end of the insertion rod has an arc rolling surface. The front end of the insertion rod forms a rolling fit with the inner surface of the insertion slot through the arc rolling surface. The lower end of the arc rolling surface protrudes downward beyond the lower side surface of the insertion rod. In this way, through the rolling fit method, it is beneficial to improve abnormal noise. At the same time, the insertion rod can effectively avoid the parting surface of the satellite shaft core. The gap between the insertion slot and the insertion rod can be controlled within 0.05 mm, further reducing or even avoiding the sound generated by the balance rod hitting the satellite shaft hole. Moreover, by adopting the structure of this satellite shaft assembly, it can be considered to cancel the oiling process and still meet the requirements of low abnormal noise or even no abnormal noise, saving man-hours and improving the yield. Even if oiling is carried out, the blind hole is easier to control the amount of oil and is convenient to operate.

[0017] Secondly, the insertion rod is designed as plastic. Usually, the satellite shaft core is also a plastic part. In this way, the cooperation between the satellite shaft core and the balance rod becomes the cooperation between plastic parts, so it can further effectively eliminate abnormal noise; at the same time, combined with the structural design of the insertion rod and the arc rolling surface, the rotation action of the insertion rod in the insertion slot is stable and smooth.

[0018] To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A is the front view of the embodiment of the present invention;

[0020] Figure 1B is the side view of the embodiment of the present invention;

[0021] Figure 2 is the top view of the embodiment of the present invention;

[0022] Figure 3 is Figure 2 the sectional view taken along A-A in

[0023] Figure 4 is the assembly view of two satellite shaft cores and a balance rod of the embodiment of the present invention;

[0024] Figure 5 is the exploded view of two satellite shaft cores and a balance rod of the embodiment of the present invention;

[0025] Figure 6 is the sectional view of two satellite shaft cores and a balance rod of the embodiment of the present invention;

[0026] Figure 7 is the assembly view of the key (including the keycap) of the embodiment of the present invention;

[0027] Figure 8It is a cross-sectional view of a key (including the keycap) according to an embodiment of the present invention;

[0028] Figure 9 It is a schematic diagram of a key structure that is more representative in the prior art;

[0029] Figure 10 It is Figure 9 Another perspective partial assembly diagram of the satellite shaft core and the balance bar in

[0030] Explanation of the attached drawing reference numerals:

[0031] Satellite shaft core 10 Insertion slot 11

[0032] Inner top surface 111 Inner bottom surface 112

[0033] Rear inner end surface 113 Avoidance inclined surface 114

[0034] Balance bar 20 Insertion rod 21

[0035] Arc rolling surface 211 Arc rolling track 212

[0036] Rotating part 213 Link rod 22

[0037] Satellite shaft seat 30 Rotating groove 31

[0038] Mechanical shaft 40 Positioning plate 50

[0039] PCB board 60 Keycap 70

[0040] Lubricating grease 80. Detailed implementation manners

[0041] Please refer to FIGS. 1 to Figure 8 as shown, which shows the specific structure of an embodiment of the present invention.

[0042] In the description of the present invention, it should be noted that for the orientation terms, if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

[0043] A satellite shaft assembly includes two satellite shaft cores 10 and a balance rod 20. Each of the satellite shaft cores 10 has a socket groove 11. The balance rod 20 has two insertion rods 21 located on both sides respectively and a connecting rod 22 connecting the rear ends of the two insertion rods 21. The front end of the insertion rod 21 extends into the socket groove 11. The socket groove 11 is a blind hole with an open rear end. The front end of the insertion rod 21 has an arc rolling surface 211. The front end of the insertion rod 21 forms a rolling fit with the inner top surface 111 and the inner bottom surface 112 of the socket groove 11 through the arc rolling surface 211. The lower end of the arc rolling surface 211 protrudes downward beyond the lower side surface of the insertion rod 21. The insertion rod 21 can effectively avoid the parting surface of the satellite shaft core 10, and the gap between the socket groove 11 and the insertion rod 21 can be controlled within 0.05 mm.

[0044] The arc rolling surface 211 has an arc rolling track 212 on the vertical section in the front-rear direction. The arc rolling track 212 is a major arc. One end of the arc rolling track 212 is connected to the top of the front end of the insertion rod 21, and the other end of the arc rolling track 212 is connected to the bottom of the front end of the insertion rod 21.

[0045] With the structure of this satellite shaft assembly, it can be considered to cancel the oiling process and still meet the requirements of low abnormal noise or even no abnormal noise, saving man-hours and improving the yield. Even when oiling, it is easier to control the amount of oil in the blind hole, and the operation is convenient. Oiling is performed from the open rear end into the socket groove 11, so that there is a lubricating grease 80 arranged near the front end in the socket groove 11.

[0046] As Figure 3 shown, the inner surface of the socket groove 11 includes a left inner side surface, a right inner side surface, an inner top surface 111, an inner bottom surface 112 and a rear inner end surface 113. The front end of the inner bottom surface 112 is connected with an avoidance inclined surface 114 extending obliquely downward forward. And the front end of the inner top surface 111 extends beyond the front ends of the inner bottom surface 112 and the avoidance inclined surface 114. There are gaps between the lower side surface of the insertion rod 21 and the inner bottom surface 112 and the avoidance inclined surface 114 of the socket groove 11.

[0047] The vertical section of the insertion rod 21 in the left-right direction is rectangular. The insertion rod 21 has a top surface, a bottom surface, a left side surface and a right side surface. The arc rolling surface 211 extends forward in an arc along the top of the front end of the insertion rod 21, then extends downward in an arc, and then extends backward in an arc to connect to the bottom of the front end of the insertion rod 21.

[0048] The outer surface of the insertion rod 21 is a plastic surface. The satellite shaft core 10 is also a plastic part. The cooperation between the satellite shaft core 10 and the balance rod 20 becomes the cooperation between plastic parts, so that abnormal noise can be further effectively eliminated.

[0049] The satellite shaft assembly further includes two satellite shaft seats 30. The satellite shaft core 10 is installed in the satellite shaft seats 30. A rotating groove 31 is provided at the rear end of the satellite shaft seat 30. The rear end of the insertion rod 21 is connected with a rotating part 213. The rotating part 213 is rotatably arranged in the rotating groove 31. The insertion rod 21 and the rotating part 213 are an integral plastic part. The left and right ends of the connecting rod 22 respectively extend beyond the insertion rods 21 on both sides. Specifically, the rotating part 213 is connected to the rear end of the insertion rod 21 and extends beyond the left and right sides of the insertion rod 21, so that the rotating part 213 and the insertion rod 21 form a T-shaped structure, improving the balance of the rotation of the rotating part 213 relative to the rotating groove 31. Preferably, the outer surface of the connecting rod 22 is a plastic surface, and a reinforcing metal wire is embedded inside the connecting rod 22, taking into account the requirements of the plastic contact surface of the balance rod and the requirements of the overall structural strength..

[0050] As Figures 8 to 9 shown, a key includes a key body. The key body has a satellite shaft assembly as described above. The key body further includes a mechanical shaft 40, a positioning plate 50, a PCB board 60 and a keycap 70.

[0051] The design focus of the present invention is that mainly by designing the insertion slot 11 as a blind hole, the front end of the insertion rod 21 has an arc rolling surface 211. The front end of the insertion rod 21 forms a rolling fit with the inner top surface 111 and the inner bottom surface 112 of the insertion slot 11 through the arc rolling surface 211. The lower end of the arc rolling surface 211 protrudes downward beyond the lower side surface of the insertion rod 21. In this way, through the rolling fit method, it is beneficial to improve abnormal noise. At the same time, the insertion rod 21 can effectively avoid the parting surface of the satellite shaft core 10. The gap between the insertion slot 11 and the insertion rod 21 can be controlled within 0.05 mm, further reducing or even avoiding the sound generated by the balance rod 20 hitting the satellite shaft hole. Moreover, with this satellite shaft assembly structure, it can be considered to cancel the oiling process and still meet the requirements of low abnormal noise or even no abnormal noise, saving man-hours and improving the yield. Even if oiling is carried out, it is easier to control the amount of oil in the blind hole, and the operation is convenient.

[0052] Secondly, the insertion rod 21 is designed as plastic. Usually, the satellite shaft core 10 is also a plastic part. In this way, the cooperation between the satellite shaft core 10 and the balance rod 20 becomes the cooperation between plastic parts, so that the abnormal noise can be further effectively eliminated. At the same time, combined with the structural design of the insertion rod 21 and the arc rolling surface 211, the rotation action of the insertion rod 21 in the insertion slot 11 is stable and smooth.

[0053] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A satellite shaft assembly, comprising two satellite shaft cores and a balance rod. Each of the satellite shaft cores has a socket groove. The balance rod has two insertion rods located on both sides respectively and a connecting rod connecting the rear ends of the two insertion rods. The front end of the insertion rod extends into the socket groove. It is characterized in that: The socket groove is a blind hole with an open rear end. The front end of the insertion rod has an arc rolling surface. The arc rolling surface has an arc rolling track in the vertical cross-section in the front-rear direction. The arc rolling track is a major arc. One end of the arc rolling track is connected to the top of the front end of the insertion rod, and the other end of the arc rolling track is connected to the bottom of the front end of the insertion rod. The front end of the insertion rod forms a rolling fit with the inner top surface and the inner bottom surface of the socket groove through the arc rolling surface. The lower end of the arc rolling surface protrudes downward beyond the lower side surface of the insertion rod. The front end of the inner bottom surface of the socket groove is connected with an avoidance inclined surface extending obliquely downward forward. The lower side surface of the insertion rod and the inner bottom surface and the avoidance inclined surface of the socket groove all maintain a gap within 0.05 mm. Moreover, the satellite shaft core is a plastic part, and the outer surface of the insertion rod is a plastic surface.

2. A satellite shaft assembly according to claim 1, It is characterized in that: There is grease provided at the front end inside the socket groove.

3. A satellite shaft assembly according to claim 1 or 2, It is characterized in that: The vertical cross-section of the insertion rod in the left-right direction is rectangular. The insertion rod has a top surface, a bottom surface, a left side surface and a right side surface. The arc rolling surface extends forward in an arc along the top of the front end of the insertion rod, then extends downward in an arc, and then extends backward in an arc to connect to the bottom of the front end of the insertion rod.

4. A satellite shaft assembly according to claim 1, It is characterized in that: The left and right ends of the connecting rod respectively extend beyond the insertion rods on both sides.

5. A satellite shaft assembly according to claim 1 or 4, It is characterized in that: The satellite shaft assembly further comprises two satellite shaft seats. The satellite shaft cores are installed in the satellite shaft seats. A rotation groove is provided at the rear end of the satellite shaft seat. The rear end of the insertion rod is connected with a rotation part, and the rotation part is rotatably arranged in the rotation groove.

6. A satellite shaft assembly according to claim 5, It is characterized in that: The insertion rod and the rotation part are an integral plastic part; the outer surface of the connecting rod is a plastic surface, and a reinforcing metal wire is embedded inside the connecting rod.

7. A button, comprising a button body, It is characterized in that: The button body has a satellite shaft assembly according to any one of claims 1 to 6.

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