Key durability test equipment

Abstract

The utility model relates to the technical field of key detection, and discloses a key durability test device, which comprises a rack, a load adjusting mechanism and a middle link floating mechanism capable of ascending and descending, the middle link floating mechanism is arranged on the rack, and the middle link floating mechanism comprises a sample fixing plate used for bearing keys; the load adjusting mechanism is arranged above the sample fixing plate, the load adjusting mechanism comprises a main sliding block capable of horizontally moving, a penetrating rod is movably arranged on the main sliding block in a penetrating mode, and a weight is installed on the upper portion of the penetrating rod; the sample fixing plate bears the to-be-tested key, the penetrating rod and the weight of the load adjusting mechanism can be jacked up under the driving of the cam mechanism, a force sensor is replaced by the weight, the pressing test of the key is realized in a jacking mode, the cost of equipment can be reduced, and meanwhile, the difficulty of software debugging can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of key detection, in particular to a key durability testing device. Background Art

[0002] In modern electronic devices and mechanical systems, keys are the main interactive interface between users and devices, and their reliability and durability are crucial. Common keys are usually composed of keycaps, springs, contacts and other components. When the keycap is pressed, the spring is compressed and the contacts come into contact with the circuit, thereby realizing the function of signal input or switch. When the keycap is released, the spring returns to its original state, the contacts are disconnected from the circuit, and the switch is turned off or the input signal is stopped.

[0003] With the continuous development of science and technology and the increasing requirements of users for product quality, the durability test of keys has become a key link in ensuring product quality and user satisfaction. In actual use, keys may be frequently pressed and worn. If the quality of keys is not good, they may fail, be damaged, and other problems may occur, affecting the user experience. Through durability testing, the actual situation of keys during long-term use can be simulated, the durability and reliability of keys can be tested, and it can be ensured that the keys can meet the user's usage needs.

[0004] Existing equipment for key durability testing usually uses a pneumatic cylinder or electric cylinder in conjunction with a force sensor to perform key and reverse force pressing tests. However, such equipment is not only costly, but also has a complicated operation and debugging process, and the frequency of pressing tests is low. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a key durability testing device, which replaces the force sensor with the weight of the load adjustment mechanism to realize the key pressing test in a jacking manner, which can not only reduce the cost of the equipment, but also reduce the difficulty of software debugging.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A key durability testing device comprises a frame, a load adjustment mechanism and a lifting and lowering central floating mechanism, wherein the central floating mechanism is arranged on the frame and comprises a sample fixing plate for carrying keys;

[0008] The load adjustment mechanism is arranged above the sample fixing plate, and the load adjustment mechanism comprises a main slider capable of horizontal movement, a through rod is movably provided on the main slider, and a weight is installed on the upper part of the through rod;

[0009] A cam mechanism for driving the sample fixing plate to rise and fall is arranged inside the frame, and when the sample fixing plate rises, it can drive a button to lift the penetration rod and the weight.

[0010] Optionally, a top plate is disposed above the sample fixing plate, the top plate is fixedly connected to the frame via a support rod, and a mounting groove for mounting the load adjustment mechanism is provided on the top plate.

[0011] Optionally, the load adjustment mechanism also includes a slide plate slidably inserted into the main slide plate, side slide plates are fixedly mounted on both ends of the slide plate, a groove is provided on one side of the side slide plate, and the side slide plate can be slidably mounted on the edge of the mounting groove through the groove.

[0012] Optionally, a positioning ring for supporting the weight is fixedly mounted on the upper portion of the penetration rod, and a contact head capable of resting against the top of the key is fixedly connected to the lower end of the penetration rod.

[0013] Optionally, the central floating mechanism further includes a first fixing plate and a second fixing plate which are arranged opposite to each other and are fixedly connected by a support column;

[0014] The first fixing plate is located inside the frame, and the supporting column is movably arranged on the frame; the first fixing plate is connected to the output end of the cam mechanism, and a supporting assembly for supporting the sample fixing plate is fixedly installed on the top of the second fixing plate.

[0015] Optionally, the support assembly includes two supporting blocks arranged opposite to each other, a notch is formed on the top of each supporting block for supporting the sample fixing plate from an edge, and a pressing plate is fixedly installed above the notch.

[0016] Optionally, a guide mechanism is also provided inside the frame, and the guide mechanism includes a plurality of guide rods vertically penetrated on the first fixed plate, the lower ends of the guide rods are fixedly connected to the frame, and the upper ends of the plurality of guide rods are fixedly connected via a connecting plate, and the connecting plate is located above the first fixed plate.

[0017] Optionally, a fixing ring is fixedly mounted on the guide rod, the fixing ring is located below the first fixing plate, and a spring is provided between the fixing ring and the first fixing plate.

[0018] Optionally, the cam mechanism includes a rotating shaft rotatably installed inside the frame, one end of the rotating shaft is eccentrically connected to an eccentric wheel, the eccentric wheel is rotatably connected to a connecting rod via a pin on the side opposite to the rotating shaft, the end of the connecting rod away from the eccentric wheel is rotatably connected to the first fixed plate via a connecting seat, and the axes of the rotating shaft and the pin do not overlap with each other.

[0019] Optionally, an adjustment groove is provided on the eccentric wheel, and an adjustment block capable of moving radially along the eccentric wheel is installed in the adjustment groove. A pressing plate for fixing the adjustment block on the eccentric wheel is provided at the open end of the adjustment groove, and one end of the pin shaft is fixedly connected to the adjustment block.

[0020] Beneficial Effects

[0021] (1) In the utility model, the sample fixing plate carries the key to be tested. Under the drive of the cam mechanism, the penetration rod and the weight of the load adjustment mechanism can be lifted up. The weight is used instead of the force sensor to realize the key pressing test in a lifting manner, which can not only reduce the cost of the equipment, but also reduce the difficulty of software debugging. In addition, the main slider can move horizontally, and the position of the penetration rod relative to the sample fixing plate can be adjusted to adapt to the arrangement of different keys.

[0022] (2) In the utility model, the rotating shaft of the cam mechanism can drive the eccentric wheel to rotate around the axis of the rotating shaft, and the eccentric wheel can drive the connecting rod to swing through the pin shaft, and then drive the first fixed plate to move up and down through the connecting rod; this mechanism can convert the rotational motion of the rotating shaft into the lifting motion of the end of the connecting rod, and drive the overall lifting of the intermediate floating mechanism through the first fixed plate, thereby greatly improving the frequency of the reciprocating lifting of the sample fixing plate, and thereby improving the frequency of the key pressing test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure inside the frame of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the load adjustment mechanism of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the central floating mechanism of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the cam mechanism of the utility model;

[0028] Among them, 1, frame; 11, door leaf; 12, through hole;

[0029] 2. Load adjustment mechanism; 21. Main slider; 22. Through rod; 23. Positioning ring; 24. Weight; 25. Slide plate; 26. Side slider; 27. Groove; 28. Contact head;

[0030] 3. Central floating mechanism; 31. First fixed plate; 32. Second fixed plate; 33. Support column; 34. Support block; 35. Press plate; 36. Sample fixing plate; 37. Connecting seat; 38. Linear bearing;

[0031] 4. Cam mechanism; 41. Rotating shaft; 42. Eccentric wheel; 43. Connecting rod; 44. Adjusting slot; 45. Adjusting block; 46. Pressing piece; 47. Pin shaft; 48. Base; 49. Motor;

[0032] 5. top plate; 51. support rod; 52. mounting groove;

[0033] 6. Guide mechanism; 61. Guide rod; 62. Fixing ring; 63. Spring; 64. Connecting plate;

[0034] 7. Bakelite board; 8. Shielding board. DETAILED DESCRIPTION

[0035] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Embodiment 1

[0036] like Figure 1-Figure 2 , Figure 4 As shown, a key durability testing device includes a frame 1, a load adjustment mechanism 2, a central floating mechanism 3, a cam mechanism 4 for driving the central floating mechanism 3 to rise and fall, a guide mechanism 6 for providing guidance for the rise and fall of the central floating mechanism 3, and a top plate 5 for installing the load adjustment mechanism 2.

[0037] A cavity is provided inside the frame 1 for installing the cam mechanism 4 and part of the central floating mechanism 3. A door leaf 11 is provided on one side of the cavity. Closing the door leaf 11 can ensure that the cavity will not be contaminated by impurities in the external environment. Opening the door leaf 11 can debug and maintain the cam mechanism 4 and the central floating mechanism 3.

[0038] The top plate 5 is disposed above the sample fixing plate 36 and is fixedly connected to the frame 1 via a support rod 51. The top plate 5 is provided with a mounting groove 52 for mounting the load adjustment mechanism 2. The support rod 51 is used to support the top plate 5 so that it can be located above the sample fixing plate 36.

[0039] like Figure 1 , Figure 3 As shown, the load adjustment mechanism 2 includes a slide plate 25, on which a main slide block 21 is slidably mounted, a through rod 22 is movably penetrated through the main slide block 21, and a weight 24 is mounted on the upper part of the through rod 22; side slide blocks 26 are fixedly mounted at both ends of the slide plate 25, a groove 27 is provided on one side of the side slide block 26, and the side slide block 26 can be slidably mounted on the edge of the mounting groove 52 through the groove 27.

[0040] As described above, the slide plate 25 is slidably installed on the inner side of the mounting groove 52 through the groove 27 on the side slide block 26, that is, the side slide block 26 is hung on the edge of the mounting groove 52 through the groove 27, and the side slide block 26 can also drive the slide plate 25 to move horizontally in a direction perpendicular to the slide plate 25 through the cooperation between the groove 27 and the top plate 5; the slide plate 25 slides through the main slide block 21, that is, the main slide block 21 can move horizontally in a direction parallel to the slide plate 25; in short, through the assembly relationship between the side slide block 26 and the mounting groove 52, and between the main slide block 21 and the slide plate 25 bracket, the horizontal position of the main slide block 21 can be arbitrarily adjusted within the range of the mounting groove 52.

[0041] Furthermore, a positioning ring 23 for supporting the weight 24 is fixedly installed on the upper part of the through rod 22, and a contact head 28 capable of abutting against the top of the key is fixedly connected to the lower end of the through rod 22. The positioning ring 23 is made of a copper sleeve and is fixedly connected to the through rod 22. It can not only support the weight 24, but also withstand the impact force when the through rod 22 descends, thereby avoiding wear between the weight 24 and the main slider 21; the contact head 28 is made of nylon material, and when it contacts the key, it can prevent the key from being accidentally damaged by a large impact force.

[0042] The number and weight of the weights 24 can be adjusted as needed, and after the position of the main slider 21 is adjusted, the side slider 26 can be fixed to the top plate 5 by screws, and the main slider 21 and the slide plate 25 can also be fixed together to avoid the position of the penetrating rod 22 from being offset during the test to ensure the accuracy of the test. By replacing the force sensor with the weights 24 and implementing the key press test in a jacking manner, not only can the cost of the equipment be reduced, but also the difficulty of software debugging can be reduced. In addition, the main slider 21 can move horizontally, and the position of the penetrating rod 22 can be adjusted to adapt to the arrangement of different keys.

[0043] like Figure 1 , Figure 4 As shown, the central floating mechanism 3 includes a first fixed plate 31 and a second fixed plate 32 that are arranged opposite to each other, and the two are fixedly connected by a support column 33; the first fixed plate 31 is located on the inner side of the frame 1, and the second fixed plate 32 is located on the outer side of the frame 1, and the support column 33 is movably penetrated on the frame 1 through a through hole 12 opened on the frame 1; and the first fixed plate 31 is connected to the output end of the cam mechanism 4, and a support component is fixedly installed on the top of the second fixed plate 32, and a sample fixing plate 36 for supporting the key is provided on the support component.

[0044] Driven by the cam mechanism 4, the sample fixing plate 36 can drive the key to lift the penetrating rod 22 and the weight 24 when it rises to complete the pressing of the key. Then the sample fixing plate 36 descends and the key returns to its original position. This reciprocating process can realize the durability test of the key.

[0045] As mentioned above, the support assembly includes two support blocks 34 arranged opposite to each other. A notch is formed on the top of the support block 34 for supporting the sample fixing plate 36 from the edge, and a pressing plate 35 is fixedly installed above the notch.

[0046] When installing the sample fixing plate 36, first place its two end edges on the notch of the support block 34 for support, then press the pressure plate 35 on the top of the support block 34 so that one end of it can press the sample fixing plate 36, then use screws to achieve a fixed connection between the pressure plate 35 and the support block 34, while limiting the freedom of the sample fixing plate 36.

[0047] like Figure 1-Figure 2 As shown, the guide mechanism 6 is arranged inside the frame 1, and includes a plurality of guide rods 61 vertically penetrated on the first fixed plate 31, the lower ends of the guide rods 61 are fixedly connected to the frame 1, and the upper ends of the plurality of guide rods 61 are fixedly connected through a connecting plate 64, and the connecting plate 64 is located above the first fixed plate 31.

[0048] A plurality of guide rods 61 can be fixedly connected together through the connecting plate 64 to increase the overall stability; and a linear bearing 38 is installed at a position corresponding to the guide rod 61 on the first fixed plate 31. The first fixed plate 31 is slidably connected to the guide rod 61 through the linear bearing 38, which can not only ensure the stability of the lifting and lowering of the first fixed plate 31, but also avoid friction and wear between the two.

[0049] A fixing ring 62 is fixedly mounted on the guide rod 61, and the fixing ring 62 is located below the first fixing plate 31, and a spring 63 is arranged between the fixing ring 62 and the first fixing plate 31. Under the action of the spring 63, the vibration of the central link floating mechanism 3 during the lifting process can be reduced, making the lifting process more stable.

[0050] Working principle:

[0051] First, place the key to be tested into the sample fixing plate 36, and adjust the penetration rod 22 to be directly above the key through the cooperation between the main slider 21, the slide plate 25 and the side slider 26; then, driven by the cam mechanism 4, the central floating mechanism 3 moves upward to drive the key to lift the penetration rod 22 and the weight 24 set on the penetration rod 22, and the weight of the weight 24 is adjustable to control the pressing force; after the central floating mechanism 3 moves downward, the key is lowered and the pressing is completed; in this process, the lifting and lowering of the central floating mechanism 3 can be guided by the guide mechanism 6. Embodiment 2

[0052] like Figure 1-Figure 2 , Figure 5As shown, on the basis of embodiment 1, the cam mechanism 4 includes a rotating shaft 41 rotatably installed inside the frame 1, one end of the rotating shaft 41 is eccentrically connected to an eccentric wheel 42, the eccentric wheel 42 is rotatably connected to a connecting rod 43 via a pin 47 on the side opposite to the rotating shaft 41, and the end of the connecting rod 43 away from the eccentric wheel 42 is rotatably connected to the first fixed plate 31 via a connecting seat 37, and the axes of the rotating shaft 41 and the pin 47 do not overlap with each other, that is, the rotating shaft 41 and the pin 47 are not coaxial.

[0053] As mentioned above, the rotating shaft 41 is rotatably installed at the bottom of the inner side of the frame 1 through the base 48. The base 48 includes a seat bearing and a pad for supporting the seat bearing. A motor 49 is also installed on the inner side of the frame 1. The output shaft of the motor 49 drives the rotating shaft 41 to rotate through a belt transmission structure. The rotating shaft 41 drives the eccentric wheel 42 to rotate. The eccentric wheel 42 converts the rotational motion into linear motion through the connecting rod 43 to drive the central floating mechanism 3 to move back and forth up and down.

[0054] Among them, a bakelite board 7 is also installed on the frame 1, and a shielding plate 8 is provided on the outside of the bakelite board 7 to protect the safety of the reserved points on the bakelite board 7; the button product is connected to the reserved points on the bakelite board 7, and after the product completes the pressing test, the bakelite board 7 can be used to detect whether it is still connected, that is, its function is to detect whether the product can still work normally after the pressing test.

[0055] Furthermore, an adjustment slot 44 is provided on the eccentric wheel 42, and an adjustment block 45 is installed in the adjustment slot 44 so as to be movable along the radial direction of the eccentric wheel 42. A pressing piece 46 for fixing the adjustment block 45 on the eccentric wheel 42 is provided at the open end of the adjustment slot 44, and one end of the pin 47 is fixedly connected to the adjustment block 45. Based on this, by adjusting the position of the adjustment block 45 in the adjustment slot 44, the stroke of the up and down movement of the key can be adjusted.

[0056] The eccentric wheel 42 of the cam mechanism 4 can convert the rotational motion into linear lifting motion through the connecting rod 43, and then drive the overall lifting and lowering of the central floating mechanism 3 through the first fixed plate 31; compared with the existing electric cylinder or cylinder drive, this structure greatly improves the frequency of the reciprocating lifting and lowering of the sample fixing plate 36, thereby increasing the frequency of the button pressing test. Embodiment 3

[0057] On the basis of Embodiment 1 and Embodiment 2, a plurality of mounting grooves 52 may be provided on the top plate 5, each mounting groove 52 is provided with a load adjustment mechanism 2, and a plurality of main sliders 21 may be installed on the slide plate 25 of the load adjustment mechanism 2; placement positions corresponding to the number of the main sliders 21 are provided on the sample fixing plate 36, and the placement positions are used to place buttons; the number and positions of the support components correspond to the number and positions of the mounting grooves 52.

[0058] For example, there are two mounting grooves 52 on the top plate 5, and there are two supporting assemblies on the second fixing plate 32, so the device has two sample fixing plates 36; each sample fixing plate 36 has four placement positions, and four main sliders 21 are slidably installed on the slide 25 of each load adjustment mechanism 2, each main slider 21 is penetrated by a through rod 22, and the weight 24 is arranged on the upper part of the through rod 22.

[0059] By adjusting the position of the slide plate 25 relative to the mounting groove 52 so that it is aligned with the placement position, and then by adjusting the spacing between the main sliders 21, the lower end of the penetration rod 22 is aligned with the placement position; based on this, the device only needs to use one motor 49 to test multiple groups of products, which greatly saves costs.

[0060] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0062] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A key durability testing device, characterized in that: It comprises a frame (1), a load adjustment mechanism (2) and a lifting and lowering central floating mechanism (3), wherein the central floating mechanism (3) is arranged on the frame (1), and the central floating mechanism (3) comprises a sample fixing plate (36) for carrying a key. The load adjustment mechanism (2) is arranged above the sample fixing plate (36), and the load adjustment mechanism (2) comprises a main slider (21) capable of horizontal movement, a through rod (22) movably penetrated through the main slider (21), and a weight (24) is installed on the upper part of the through rod (22); A cam mechanism (4) for driving the sample fixing plate (36) to rise and fall is arranged inside the frame (1), and when the sample fixing plate (36) rises, it can drive a key to lift the penetration rod (22) and the weight (24).

2. The key durability testing device according to claim 1, characterized in that: A top plate (5) is arranged above the sample fixing plate (36), the top plate (5) is fixedly connected to the frame (1) via a support rod (51), and a mounting groove (52) for mounting the load adjustment mechanism (2) is provided on the top plate (5).

3. The key durability testing device according to claim 2, characterized in that: The load adjustment mechanism (2) further comprises a slide plate (25) slidably mounted on the main slide plate (21), side slide plates (26) being fixedly mounted on both ends of the slide plate (25), a groove (27) being formed on one side of the side slide plate (26), and the side slide plate (26) can be slidably mounted on the edge of the mounting groove (52) through the groove (27).

4. The key durability testing device according to claim 3, characterized in that: A positioning ring (23) for supporting the weight (24) is fixedly mounted on the upper portion of the penetration rod (22), and a contact head (28) capable of abutting against the top of the key is fixedly connected to the lower end of the penetration rod (22).

5. The key durability testing device according to claim 1, characterized in that: The central floating mechanism (3) further comprises a first fixing plate (31) and a second fixing plate (32) which are arranged opposite to each other and are fixedly connected via a support column (33); The first fixing plate (31) is located inside the frame (1), and the support column (33) is movably arranged on the frame (1); the first fixing plate (31) is connected to the output end of the cam mechanism (4), and a support component for supporting the sample fixing plate (36) is fixedly installed on the top of the second fixing plate (32).

6. The key durability testing device according to claim 5, characterized in that: The support assembly comprises two support blocks (34) arranged opposite to each other, a notch is provided on the top of each support block (34) for supporting the sample fixing plate (36) from the edge, and a pressing plate (35) is fixedly mounted above the notch.

7. The key durability testing device according to claim 5, characterized in that: A guide mechanism (6) is also provided inside the frame (1), and the guide mechanism (6) comprises a plurality of guide rods (61) vertically penetrated through the first fixed plate (31), the lower ends of the guide rods (61) are fixedly connected to the frame (1), and the upper ends of the plurality of guide rods (61) are fixedly connected via a connecting plate (64), and the connecting plate (64) is located above the first fixed plate (31).

8. The key durability testing device according to claim 7, characterized in that: A fixing ring (62) is fixedly mounted on the guide rod (61); the fixing ring (62) is located below the first fixing plate (31); and a spring (63) is provided between the fixing ring (62) and the first fixing plate (31).

9. The key durability testing device according to any one of claims 5 to 8, characterized in that: The cam mechanism (4) comprises a rotating shaft (41) rotatably mounted inside the frame (1); one end of the rotating shaft (41) is eccentrically connected to an eccentric wheel (42); a side of the eccentric wheel (42) opposite to the rotating shaft (41) is rotatably connected to a connecting rod (43) via a pin (47); an end of the connecting rod (43) away from the eccentric wheel (42) is rotatably connected to the first fixing plate (31) via a connecting seat (37); and the axes of the rotating shaft (41) and the pin (47) do not overlap with each other.

10. The key durability testing device according to claim 9, characterized in that: The eccentric wheel (42) is provided with an adjustment groove (44), in which an adjustment block (45) capable of moving in the radial direction of the eccentric wheel (42) is installed, and a pressing piece (46) for fixing the adjustment block (45) on the eccentric wheel (42) is provided at the open end of the adjustment groove (44), and one end of the pin shaft (47) is fixedly connected to the adjustment block (45).

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