Testing equipment for bonding strength of silica gel key

Abstract

The utility model discloses equipment for testing the bonding strength of a silica gel key. The equipment comprises a base and an automatic clamping mechanism, a rotating table is arranged at the upper end of the base, a stand column is arranged on the rear side of the upper surface of the base, a second electric push rod is fixedly connected to the upper end of the stand column, a mounting plate is fixedly connected to the lower end of the telescopic end of the second electric push rod, and a tension sensor is arranged at the lower end of the mounting plate. An air inlet of the vacuum chuck is communicated with an external air pump; the automatic clamping mechanism comprises clamping tables and a pressing plate, the edge of the upper surface of the rotating table is connected with the clamping tables which are evenly distributed in the circumferential direction through bolts, and sliding grooves are formed in the upper ends of the clamping tables. According to the silica gel key bonding strength test equipment, the silica gel key is grabbed upwards through the vacuum chuck, so that the bonding strength test of the silica gel key is realized, meanwhile, semi-automatic clamping of a circuit board can be realized, and the working pressure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of silicone keypad detection, in particular to a silicone keypad lamination strength testing device. Background Art

[0002] Silicone key switches are used as switches on circuit boards such as PCBs and FPCs, leveraging their stable rebound force to provide the operator with excellent tactile feedback. During the production of silicone key switches, the silicone keys (referred to in the industry as single keys or rubber domes) are pre-laminated onto a full sheet of Mylar sheet. These are then die-cut into individual silicone key switches and laminated onto the circuit board. Together with the corresponding keycaps and other components, they form a complete key and keyboard structure.

[0003] After the silicone key switch is attached to the circuit board, the attachment may be unstable due to various reasons. The existing technology lacks a strength test for the silicone key attachment. If workers manually inspect each one one by one, the workload is large. Therefore, a silicone key attachment strength testing device is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a silicone key fitting strength testing device. The silicone key is grasped upward by a vacuum suction cup to achieve silicone key fitting strength testing. At the same time, it can realize semi-automatic clamping of the circuit board, reduce working pressure, and effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a silicone keypad fitting strength testing device, comprising a base and an automatic clamping mechanism;

[0006] A rotating table is provided at the upper end of the base, a column is provided on the rear side of the upper surface of the base, the upper end of the column is fixedly connected to the second electric push rod, the lower end of the telescopic end of the second electric push rod is fixedly connected to the mounting plate, the lower end of the mounting plate is provided with a tension sensor, the lower end of the detection end of the tension sensor is fixedly connected to a vacuum suction cup, and the air inlet of the vacuum suction cup is connected to the external air pump;

[0007] The automatic clamping mechanism includes a clamping table and a pressure plate. The upper surface edge of the rotating table is connected to the clamping table evenly distributed around the circumference by bolts. The upper end of the clamping table is provided with a slide groove. The upper end of the clamping table is connected to the pressure plate by rotating a pin shaft. The pressure plate is located at the upper end of the slide groove. The silicone button is grabbed upward by the vacuum suction cup to realize the silicone button fitting strength test. At the same time, it can realize semi-automatic clamping of the circuit board to reduce work pressure.

[0008] Furthermore, it also includes a controller, which is arranged on the rear side of the column, the input end of the controller is electrically connected to the external power supply, the tension sensor is bidirectionally electrically connected to the controller, and the input end of the electric push rod 2 is electrically connected to the output end of the controller to control the electrical appliance.

[0009] Furthermore, a cam divider is fixedly connected to the bottom wall of the base, the upper end of the rotating seat of the cam divider is fixedly connected to the lower end of the rotating table, and the input end of the cam divider is electrically connected to the output end of the controller to realize intermittent rotation of the rotating table.

[0010] Furthermore, the automatic clamping mechanism also includes a control switch, a control panel and an indicator light. The edges of the clamping table are provided with control panels, and the upper ends of the control panels are provided with control switches and indicator lights. The lower end of the outer surface of the rotating table is fixedly sleeved with the slip ring of the collector ring, and the middle part of the rotating table is provided with evenly distributed wire holes. The bottom wall of the base is provided with a support frame, and the upper surface of the support frame is fixedly connected to the contact contact of the collector ring. The inner wall of the slip ring of the collector ring is slidably connected to the contact contact of the collector ring. The input end of the contact contact of the collector ring is electrically connected to the output end of the controller, and the input ends of the control switch and the indicator light are electrically connected to the output end of the slip ring of the collector ring, controlling the buckling and opening of the pressure plate and indicating the status of the circuit board.

[0011] Furthermore, the automatic clamping mechanism also includes a telescopic column and an electric push rod 1. The right side of the clamping platform is rotatably connected to the electric push rod 1, and the left side of the clamping platform is rotatably connected to the telescopic column. A pin shaft 2 is rotatably connected between the upper end of the telescopic column of the same clamping platform and the telescopic end of the electric push rod 1. The pin shaft 2 is rotatably connected to the front side of the upper end of the adjacent pressure plate, and the input end of the electric push rod 1 is electrically connected to the output end of the control switch located on the same clamping platform, so that the pressure plate is buckled on the upper end of the clamping platform.

[0012] Furthermore, the automatic clamping mechanism also includes a ball plunger, and the upper surface of the clamping table is fixedly connected to one end away from the central axis of the rotating table with a ball plunger symmetrically distributed on the left and right to prompt the circuit board to be installed in place.

[0013] Furthermore, a distance measuring sensor is provided on the lower surface of the mounting plate, and the distance measuring sensor corresponds to the upper and lower positions of the vertically adjacent clamping platforms. The distance measuring sensor is bidirectionally electrically connected to the controller to detect the relative distance to the vertically adjacent circuit board.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Use the electric push rod to push the vacuum suction cup to pick up the silicone button. The tension sensor detects the tension and detects whether the silicone button is pulled out under the set tension to achieve the silicone button fitting strength test;

[0016] 2. The personnel will insert the circuit board with inspection into the inside of the slide of the clamping table. When the circuit board is fully inserted, the ball of the ball plunger will push out and make a sound, indicating that it is installed in place. The control switch will start the electric push rod 1, pushing the pressure plate to buckle with the upper end of the clamping table. The front side of the lower surface of the pressure plate is provided with steps, so that the circuit board is firmly fixed in the slide. If the test fails, the indicator light will light up. The semi-automatic clamping mechanism can reduce the labor intensity of the workers and reduce the false detection rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A of the utility model;

[0020] Figure 4 It is a schematic diagram of the rear view of the structure of the present invention.

[0021] In the figure: 1 base, 2 rotating table, 3 automatic clamping mechanism, 31 clamping table, 32 control switch, 33 control board, 34 indicator light, 35 ball plunger, 36 telescopic column, 37 electric push rod 1, 38 pressure plate, 4 cam divider, 5 slip ring, 6 column, 7 electric push rod 2, 8 mounting plate, 9 vacuum suction cup, 10 distance sensor, 11 wire hole, 12 tension sensor, 13 controller. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4, this embodiment provides a technical solution: a silicone keypad fitting strength testing device, comprising a base 1, an automatic clamping mechanism 3 and a controller 13; a rotating table 2 is provided at the upper end of the base 1, and a column 6 is provided on the rear side of the upper surface of the base 1, the upper end of the column 6 is fixedly connected to an electric push rod 2 7 connected to the controller 13, the lower end of the telescopic end of the electric push rod 2 7 is fixedly connected to a mounting plate 8, the lower end of the mounting plate 8 is provided with a tension sensor 12 bidirectionally electrically connected to the controller 13, the lower end of the detection end of the tension sensor 12 is fixedly connected to a vacuum suction cup 9, the air inlet of the vacuum suction cup 9 is connected to an external air pump, a cam divider 4 is fixedly connected to the bottom wall of the base 1, the upper end of the rotating seat of the cam divider 4 is fixedly connected to the lower end of the rotating table 2, the input end of the cam divider 4 is electrically connected to the output end of the controller 13, and a distance sensor 10 is provided on the lower surface of the mounting plate 8, the distance sensor 10 corresponds to the upper and lower positions of the vertically adjacent clamping table 31, and the distance sensor 10 is bidirectionally electrically connected to the controller 13.

[0024] Among them, the automatic clamping mechanism 3 includes a clamping platform 31 and a pressure plate 38. The edge of the upper surface of the rotating table 2 is connected to the clamping platform 31 with uniform distribution around the circumference by bolts. The upper end of the clamping platform 31 is provided with a slide groove. The upper end of the clamping platform 31 is rotatably connected to the pressure plate 38 through a pin shaft, and the pressure plate 38 is located at the upper end of the slide groove; the automatic clamping mechanism 3 includes a control switch 32, a control panel 33 and an indicator light 34. The edge of the clamping platform 31 is provided with a control panel 33. The upper end of the control panel 33 is provided with a control switch 32 and an indicator light 34. The lower end of the outer surface of the rotating table 2 is fixedly sleeved with the slip ring of the collector ring 5. The middle part of the rotating table 2 is provided with uniformly distributed wire holes 11. The bottom wall of the base 1 is provided with a support frame. The upper surface of the support frame is fixedly connected to the contact contact of the collector ring 5. The inner wall of the slip ring of the collector ring 5 is slidably connected to the contact contact of the collector ring 5. The input end of the contact is electrically connected to the output end of the controller 13, and the input ends of the control switch 32 and the indicator light 34 are electrically connected to the output end of the slip ring of the collector ring 5; the automatic clamping mechanism 3 also includes a telescopic column 36 and an electric push rod 37. The right side of the clamping platform 31 is rotatably connected to the electric push rod 37, and the left side of the clamping platform 31 is rotatably connected to the telescopic column 36. A pin shaft 2 is rotatably connected between the upper end of the telescopic column 36 and the telescopic end of the electric push rod 37 of the same clamping platform 31. The pin shaft 2 is rotatably connected to the front side of the upper end of the adjacent pressure plate 38, and the input end of the electric push rod 37 is electrically connected to the output end of the control switch 32 located on the same clamping platform 31; the automatic clamping mechanism 3 also includes a ball head plunger 35, and the end of the upper surface of the clamping platform 31 away from the central axis of the rotating platform 2 is fixedly connected to the ball head plunger 35 symmetrically distributed on the left and right.

[0025] The working principle of this utility model is as follows:

[0026] The controller 13 is used to turn on each electrical appliance, and the cam divider 4 drives the rotating table 2 to rotate intermittently. The personnel inserts the circuit board with the test into the inside of the slide groove of the clamping table 31. When the circuit board is fully inserted, the ball of the ball plunger 35 pushes out and makes a sound, prompting that it is installed in place. The control switch 32 is pressed, and the control switch 32 activates the electric push rod 37. The telescopic end of the electric push rod 37 is retracted, the telescopic column 36 is retracted, and the pressure plate 38 is buckled into the upper end of the clamping table 31. The front side of the lower surface of the pressure plate 38 is provided with a step, so that the circuit board is firmly fixed inside the slide groove;

[0027] As the rotating table 2 rotates intermittently, the clamping table 31 on which the circuit board is fixed rotates to the lower end of the vacuum suction cup 9, and the telescopic end of the electric push rod 2 7 is pushed out. The distance measuring sensor 10 detects the relative distance with the clamping table 31 and feeds back to the controller 13 to accurately control the pushing distance of the electric push rod 2 7. The lower end of the vacuum suction cup 9 contacts the silicone button attached to the circuit board, the external air pump draws air, the vacuum suction cup 9 adsorbs the silicone button, and then the contraction end of the electric push rod 2 7 is retracted a certain distance, the vacuum suction cup 9 pulls the silicone button, and the tension sensor 12 feeds back the pressure change to the controller 13. The controller 13 controls the air pressure change of the external air pump to realize the suction control of the vacuum suction cup 9. When the silicone button is sucked out, the tension sensor 12 instantly becomes smaller. The controller 13 transmits the control signal to the corresponding indicator light 34 by controlling the contact contact and slip ring of the collector ring 5. The corresponding indicator light 34 lights up, which is convenient for personnel to collect unqualified products. The wire hole 11 is convenient for the arrangement of wires and controllers.

[0028] It is worth noting that the controller 13 disclosed in the above embodiment can use the FX3SA-30MR-CM PLC controller, the electric push rod 37 can use the JZN180B electric push rod, the cam divider 4 can use the SZG35F750 cam divider, the slip ring 5 can use the ZX-JDH-115 slip ring, the electric push rod 2 7 can use the ANT-16N electric push rod, the distance sensor 10 can use the LTP150 distance sensor, and the tension sensor 12 can use the NTJL-1C S-type tension sensor. The controller 13 controls the operation of the electric push rod 37, the cam divider 4, the slip ring 5, the electric push rod 2 7, the distance sensor 10, the tension sensor 12 and the external air pump using methods commonly used in the prior art.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A silicone keypad bonding strength testing device, characterized by: It comprises a base (1) and an automatic clamping mechanism (3); A rotating platform (2) is provided at the upper end of the base (1), a column (6) is provided on the rear side of the upper surface of the base (1), the upper end of the column (6) is fixedly connected to an electric push rod (7), the lower end of the telescopic end of the electric push rod (7) is fixedly connected to a mounting plate (8), the lower end of the mounting plate (8) is provided with a tension sensor (12), the lower end of the detection end of the tension sensor (12) is fixedly connected to a vacuum suction cup (9), and the air inlet of the vacuum suction cup (9) is connected to an external air pump; The automatic clamping mechanism (3) includes a clamping platform (31) and a pressure plate (38). The upper surface edge of the rotating platform (2) is connected to the clamping platform (31) uniformly distributed around the circumference by bolts. The upper ends of the clamping platforms (31) are provided with slide grooves. The upper ends of the clamping platforms (31) are rotatably connected to the pressure plate (38) through a pin shaft. The pressure plate (38) is located at the upper end of the slide groove.

2. The silicone keypad bonding strength testing device according to claim 1, characterized in that: The utility model further comprises a controller (13), wherein the controller (13) is arranged on the rear side of the column (6), the input end of the controller (13) is electrically connected to an external power supply, the tension sensor (12) is bidirectionally electrically connected to the controller (13), and the input end of the second electric push rod (7) is electrically connected to the output end of the controller (13).

3. The silicone keypad bonding strength testing device according to claim 2, characterized in that: The bottom wall of the base (1) is fixedly connected to a cam divider (4), the upper end of the rotating seat of the cam divider (4) is fixedly connected to the lower end of the rotating platform (2), and the input end of the cam divider (4) is electrically connected to the output end of the controller (13).

4. The silicone keypad bonding strength testing device according to claim 3, characterized in that: The automatic clamping mechanism (3) further comprises a control switch (32), a control panel (33) and an indicator light (34); the edges of the clamping platform (31) are provided with a control panel (33); the upper end of the control panel (33) is provided with a control switch (32) and an indicator light (34); the lower end of the outer surface of the rotating platform (2) is fixedly sleeved with the slip ring of the collector ring (5); the middle part of the rotating platform (2) is provided with evenly distributed wire holes (11); the bottom wall of the base (1) is provided with a support frame; the upper surface of the support frame is fixedly connected to the contact point of the collector ring (5); the inner wall of the slip ring of the collector ring (5) is slidably connected to the contact point of the collector ring (5); the input end of the contact point of the collector ring (5) is electrically connected to the output end of the controller (13); the input ends of the control switch (32) and the indicator light (34) are both electrically connected to the output end of the slip ring of the collector ring (5).

5. The silicone keypad bonding strength testing device according to claim 4, characterized in that: The automatic clamping mechanism (3) further comprises a telescopic column (36) and an electric push rod (37). The right side of the clamping platform (31) is rotatably connected to the electric push rod (37). The left side of the clamping platform (31) is rotatably connected to the telescopic column (36). A pin shaft (2) is rotatably connected between the upper end of the telescopic column (36) and the telescopic end of the electric push rod (37) of the same clamping platform (31). The pin shaft (2) is rotatably connected to the front side of the upper end of the adjacent pressure plate (38). The input end of the electric push rod (37) is electrically connected to the output end of the control switch (32) located on the same clamping platform (31).

6. The silicone keypad bonding strength testing device according to claim 1, characterized in that: The automatic clamping mechanism (3) further comprises a ball plunger (35), and one end of the upper surface of the clamping platform (31) away from the central axis of the rotating platform (2) is fixedly connected with the ball plunger (35) which is symmetrically distributed on the left and right.

7. The silicone keypad bonding strength testing device according to claim 2, characterized in that: A distance sensor (10) is provided on the lower surface of the mounting plate (8), the distance sensor (10) corresponds to the upper and lower positions of the vertically adjacent clamping platform (31), and the distance sensor (10) is bidirectionally electrically connected to the controller (13).

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