Keyboard roller anti-falling mechanism

Abstract

The utility model discloses an anti-falling mechanism for a keyboard roller, and aims to provide the anti-falling mechanism for the keyboard roller, which is simple in structure and long in service life, and realizes the falling buffering of the roller through a linkage mechanism. The device comprises a roller, a PCB assembly and a lower cover, the PCB assembly comprises a PCB, an encoder and a light touch switch, the encoder and the light touch switch are arranged on the two sides of the upper end face of the PCB respectively, an insertion shaft on one side of the roller is in rotating fit with the rotating end of the encoder, a pressing shaft on the other side of the roller is arranged at the upper end of the light touch switch, and the lower cover is arranged on the lower cover. A first avoiding hole matched with the bottom of the roller is formed in the middle of the PCB, and the roller is matched with a supporting rib in the middle of the upper end face of the lower cover through the first avoiding hole. The distance between the bottom of the idler wheel and the upper end of the supporting rib is larger than the sum of the distance between the inserting shaft and the light touch switch and the stroke distance of the light touch switch. The roller protection device is applied to the technical field of roller protection.

Description

Technical Field

[0001] The utility model is applied to the technical field of roller protection, and particularly relates to a keyboard roller anti-falling mechanism. Background Art

[0002] With the continuous development and progress of science and technology, various electronic products are becoming more and more intelligent. Traditional electronic products are constantly integrating new functions so that products can meet the various usage needs of consumers at the same time. In the peripheral industry, such as mice, keyboards and other products, with the development of such product technology and the increasing new demands of consumers, in order to cater to market changes, manufacturers will add many new functions and structures to their products. For example, adding a mouse-like scroll wheel to the keyboard to adjust the keyboard backlight brightness or computer volume and other functions. However, since the scroll wheel structure protrudes from the outer surface of the keyboard and the keyboard is much heavier than the mouse, this type of peripheral product will occasionally fall or bump into something during use. When the keyboard falls, if the keyboard wheel touches the ground first, the wheel will be subjected to a huge impact force, and this impact force will be transmitted to the various components that cooperate with the wheel, causing the more sensitive internal components to vibrate or bump and cause damage. Currently, the keyboard wheel adjustment on the market mainly reduces the impact caused by the fall by setting a floating spring at the bottom of the entire wheel assembly. However, this method will affect the overall feel of the wheel, and this method can only slow down the impact of the entire wheel assembly, and cannot reduce the force transmission between the wheel and the close components. When the impact force of the fall is large, there is still a high probability of damage. If a keyboard wheel anti-drop mechanism with a simple structure, a long service life, and a linkage mechanism to achieve wheel drop buffering can be designed, the above problems can be solved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a keyboard roller anti-drop mechanism which has a simple structure, a long service life and realizes roller drop buffering through a linkage mechanism.

[0004] The technical solution adopted by the present invention is as follows: the present invention includes a roller, a PCB assembly and a lower cover, the PCB assembly includes a PCB board, an encoder and a touch switch, the encoder and the touch switch are respectively arranged on both sides of the upper end surface of the PCB board, the plug shaft on one side of the roller is rotatably matched with the rotating end of the encoder, the pressure shaft on the other side of the roller is arranged at the upper end of the touch switch, a first avoidance hole adapted to the bottom of the roller is provided in the middle of the PCB board, the roller is matched with the support rib in the middle of the upper end surface of the lower cover through the first avoidance hole, and the distance between the bottom of the roller and the upper end of the support rib is greater than the distance between the plug shaft and the touch switch plus the travel distance of the touch switch.

[0005] Furthermore, a truncation groove and a buffer groove are provided on one side of the PCB board, and the truncation groove and the buffer groove are respectively provided at two ends of the touch switch.

[0006] Furthermore, the pressure shaft drives the touch switch to be pressed down beyond the distance between the pressure shaft and the touch switch plus the stroke distance of the touch switch, so that the PCB board cantilever structure between the truncation groove and the buffer groove bends downward, and the bottom of the lower end of the roller cooperates with the support rib.

[0007] Furthermore, an upper cover and a roller decoration cover are provided on the upper end of the PCB board, and the roller decoration cover is connected to the PCB board through the upper cover.

[0008] Furthermore, a second avoidance hole is provided in the middle of the roller decorative cover, and two sides of the roller decorative cover are respectively matched with the encoder and the touch switch, and the second avoidance hole is matched with the roller.

[0009] Furthermore, the PCB assembly is connected to the upper end of the keyboard body through the upper cover.

[0010] Furthermore, the lower cover is configured as a multi-section arc-shaped deflection structure, the lower cover connection end is connected to the lower end of the keyboard body, and the support rib is arranged in the middle of the lower cover arc structure and corresponds to the lower end of the roller.

[0011] The beneficial effects of the present invention are as follows: the encoder and the tact switch are welded on both sides of the PCB board; the roller decorative cover limits the roller so that it can only rotate about its axis or move up and down perpendicular to the plane of the upper cover; an avoidance hole is provided in the middle of the PCB board to prevent the roller from colliding and interfering with the PCB; the truncation groove and the buffer groove are provided on one side of the PCB board, so that a cantilever structure capable of bending and buffering can be separated from the PCB board. During the process of the roller colliding and pressing down, the cantilever structure can bend and buffer, thereby reducing the impact force of the roller on the touch switch; the support rib on the upper end surface of the lower cover maintains a certain relative gap D with the bottom of the roller; the gap between the pressure shaft on the roller and the tact switch plus the stroke d of the tact switch is less than the relative gap D; when d plus the deformation distance of the cantilever structure exceeds a certain value D, the bottom of the roller will contact the support rib, thereby preventing overpressure while ensuring normal use of the tact switch; the structure is simple, and buffering is achieved through the linkage of multiple structures, which can avoid damage to components due to collision and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional view of the utility model;

[0013] Figure 2It is a side view of the utility model;

[0014] Figure 3 It is an exploded view of the utility model;

[0015] Figure 4 It is a cross-sectional view of the utility model;

[0016] Figure 5 is a three-dimensional view of the lower cover;

[0017] Figure 6 is a plan view of the roller;

[0018] Figure 7 is a three-dimensional view of the roller decorative cover;

[0019] Figure 8 1 is a three-dimensional view of the PCB board. DETAILED DESCRIPTION

[0020] like Figures 1 to 8 As shown, in this embodiment, the utility model includes a roller 1, a PCB assembly 2 and a lower cover 3, the PCB assembly 2 includes a PCB board 4, an encoder 5 and a touch switch 6, the encoder 5 and the touch switch 6 are respectively arranged on both sides of the upper end surface of the PCB board 4, the plug shaft 11 on one side of the roller 1 is rotatably matched with the rotating end of the encoder 5, and the pressure shaft 12 on the other side of the roller 1 is arranged at the upper end of the touch switch 6, and a first avoidance hole 7 adapted to the bottom of the roller 1 is provided in the middle of the PCB board 4, and the roller 1 is matched with the support rib 8 in the middle of the upper end surface of the lower cover 3 through the first avoidance hole 7. The distance between the bottom of the roller 1 and the upper end of the support rib 8 is greater than the distance between the plug shaft 11 and the touch switch 6 plus the travel distance of the touch switch 6. It can be seen that the encoder 5 and the touch switch 6 are welded on both sides of the PCB board 4, the plug shaft 11 on one side of the roller 1 rotates with the rotating end of the encoder 5, and the pressure shaft 12 at the other end is set at the upper end of the touch switch 6. In the process of satisfying the rolling adjustment of the roller 1, the touch switch 6 can be triggered by lightly touching and pressing down to realize more adjustment functions and meet the needs of multi-functional use.

[0021] like Figure 3 and Figure 8 As shown, in this embodiment, a cutout groove 9 and a buffer groove 10 are provided on one side of the PCB board 4. The cutout groove 9 and the buffer groove 10 are respectively provided at both ends of the tact switch 6. Thus, the cutout groove 9 and the buffer groove 10 are provided on one side of the PCB board 4, thereby forming a cantilever structure on the PCB board 4 that can bend and buffer. During the downward impact of the roller 1, the cantilever structure can bend and buffer, thereby reducing the impact of the roller 1 on the tact switch 6.

[0022] like Figure 4 As shown, in this embodiment, the pressing shaft 12 drives the tact switch 6 to press down beyond the distance between the pressing shaft 12 and the tact switch 6 plus the stroke distance of the tact switch 6, so that the cantilever structure of the PCB board 4 between the truncation groove 9 and the buffer groove 10 bends downward, and the bottom of the lower end of the roller 1 cooperates with the support rib 8. It can be seen that when the roller 1 collides and is pressed down, the amount of pressure applied to the roller is greater than that applied during daily use. The support rib 8 on the upper end surface of the lower cover 3 maintains a certain relative gap D with the bottom of the roller 1. The gap between the pressing shaft 12 on the roller and the tactile switch 6 plus the stroke of the tactile switch is d, and d+0.5mm>D≥d+0.2mm. D≥d+0.2mm is so that the roller 1 can complete the pressing of the tactile switch 6 before it hits the support rib 8 after being pressed normally, thereby ensuring the normal function of the tactile switch; d+0.5mm>D is so that when the keyboard falls, if the roller 1 touches the ground first, the roller 1 will first transfer the impact force to the PCB board 4 through the tactile switch 1, and then the PCB board 4 will bend downward under the force, causing the bottom of the roller 1 to touch the support rib 8, transferring most of the subsequent impact force to the lower cover 3, thereby protecting the tactile switch 6 from being damaged by the huge impact force.

[0023] like Figures 1 to 4 As shown, in this embodiment, an upper cover 13 and a roller decorative cover 14 are further provided on the upper end of the PCB board 4. The roller decorative cover 14 is connected to the PCB board 4 through the upper cover 13. It can be seen that the roller decorative cover 14 limits the position of the roller 1, so that it can only rotate around its axis or move up and down perpendicular to the plane of the upper cover, and protects the encoder 5 and the tactile switch 6 from external interference.

[0024] like Figures 1 to 4 As shown, in this embodiment, a second avoidance hole 15 is provided in the middle of the roller decorative cover 14. The two sides of the roller decorative cover 14 conform to the encoder 5 and the tact switch 6, respectively, and the second avoidance hole 15 cooperates with the roller 1. Thus, the second avoidance hole 15 allows the roller 1 to rotate on the PCB board 4 without collision or interference.

[0025] like Figures 1 to 4 As shown, in this embodiment, the PCB assembly 2 is connected to the upper end of the keyboard body through the upper cover 13. It can be seen that the PCB assembly 2 and the roller decorative cover 14 are arranged on the upper end of the keyboard, which can facilitate the adjustment of various functions.

[0026] like Figures 1 to 4As shown, in this embodiment, the lower cover 3 is configured as a multi-segment arc-shaped deflection structure. The connection end of the lower cover 3 is connected to the lower end of the keyboard body. The support rib 8 is located in the middle of the arc-shaped structure of the lower cover 3 and corresponds to the lower end of the roller 1. Thus, the multi-segment arc-shaped deflection structure of the lower cover 3 can effectively provide bending buffering, allowing the roller 1 to transfer greater impact force to the lower cover 3, thereby enhancing the buffering capacity.

[0027] The working principle of the present utility model is as follows: the adjustment of various functions is achieved by rotating or lightly touching and pressing the roller 1. When the keyboard falls and the roller 1 contacts the bottom surface, the roller 1 is pressed down and contacts the touch switch 6. When the downward stroke of the roller 1 is less than d+0.2mm, the touch switch 6 is in the normal downward use range, and the downward bending of the cantilever structure of the PCB board 4 is also within the normal floating range. When the downward stroke of the roller 1 is greater than or equal to d+0.2mm, the roller 1 will first transfer the impact force to the PCB board 4 through the touch switch 1, and then the cantilever structure of the PCB board 4 is forced to bend downward and deform so that the bottom of the roller 1 contacts the support rib 8, and most of the subsequent impact force is transferred to the lower cover 3 to bear, thereby protecting the touch switch 6 from being damaged by the huge impact force, thereby preventing the keyboard roller from falling and being damaged.

[0028] Although the embodiments of the present invention are described with practical solutions, they do not limit the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A keyboard roller anti-drop mechanism, comprising a roller (1), a PCB assembly (2) and a lower cover (3), characterized in that: The PCB assembly (2) includes a PCB board (4), an encoder (5) and a touch switch (6), wherein the encoder (5) and the touch switch (6) are respectively arranged on both sides of the upper end surface of the PCB board (4), the plug shaft (11) on one side of the roller (1) is rotatably matched with the rotating end of the encoder (5), and the pressure shaft (12) on the other side of the roller (1) is arranged on the upper end of the touch switch (6). A first avoidance hole (7) adapted to the bottom of the roller (1) is provided in the middle of the PCB board (4), and the roller (1) is matched with the support rib (8) in the middle of the upper end surface of the lower cover (3) through the first avoidance hole (7). The distance between the bottom of the roller (1) and the upper end of the support rib (8) is greater than the distance between the plug shaft (11) and the touch switch (6) plus the travel distance of the touch switch (6).

2. The keyboard roller anti-drop mechanism according to claim 1, characterized in that: A cut-off groove (9) and a buffer groove (10) are provided on one side of the PCB board (4), and the cut-off groove (9) and the buffer groove (10) are respectively provided at two ends of the tactile switch (6).

3. The keyboard roller anti-drop mechanism according to claim 2, characterized in that: The pressing shaft (12) drives the tactile switch (6) to be pressed downward by exceeding the distance between the pressing shaft (12) and the tactile switch (6) plus the travel distance of the tactile switch (6), so that the cantilever structure of the PCB board (4) between the truncation groove (9) and the buffer groove (10) bends downward, and the bottom of the lower end of the roller (1) is matched with the supporting rib (8).

4. The keyboard roller anti-drop mechanism according to claim 1, characterized in that: An upper cover (13) and a roller decoration cover (14) are also provided at the upper end of the PCB board (4); the roller decoration cover (14) is connected to the PCB board (4) via the upper cover (13).

5. The keyboard roller anti-drop mechanism according to claim 4, characterized in that: A second avoidance hole (15) is provided in the middle of the roller decorative cover (14), and two sides of the roller decorative cover (14) are respectively matched with the encoder (5) and the touch switch (6), and the second avoidance hole (15) is matched with the roller (1).

6. The keyboard roller anti-drop mechanism according to claim 4, characterized in that: The PCB assembly (2) is connected to the upper end of the keyboard body via the upper cover (13).

7. The keyboard roller anti-drop mechanism according to claim 5, characterized in that: The lower cover (3) is configured as a multi-section arc-shaped deflection structure, the connecting end of the lower cover (3) is connected to the lower end of the keyboard body, and the supporting rib (8) is arranged in the middle of the arc-shaped structure of the lower cover (3) and corresponds to the lower end of the roller (1).

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