Switch detection jig

Abstract

The utility model provides a switch detection tool comprising a base plate, the top surface of the base plate is connected with a supporting column and a supporting frame, the supporting column is slidably connected with a detection mechanism, one side, close to the supporting column, of the supporting frame is connected with a driving mechanism, the driving mechanism is in driving connection with the detection mechanism, and the driving mechanism drives the detection mechanism to move up and down along the supporting column. The detection mechanism comprises a pressing device and a contact pin, and the contact pin is electrically connected with the electrical test device. During detection, the pressing device applies pressure to the membrane switch, and the contact pin abuts against the power supply contact. According to the utility model, the film contact switch can be detected at stable pressure and speed, the influence caused by different detection methods of personnel is avoided, the stability and reliability of the test are improved, the error caused by subjective judgment is reduced, and the rapid detection requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit board detection, and specifically relates to a switch detection fixture. BACKGROUND

[0002] With the vigorous development of emerging technologies such as the Internet of Things, smart home, wearable devices, electronic devices are moving towards thin, portable, high-performance. Thin film touch switch, with its excellent waterproof, dustproof, oil and corrosion resistance, as well as small size, fast response, touch sensitive, easy to operate and other characteristics, become the key components of modern electronic devices, market demand is showing a rapid growth trend.

[0003] At present, the detection method of thin film touch switch mainly depends on the measurement of multimeter combined with manual pressing method. Manual pressing operation is simple, without complex equipment, can intuitively feel the touch and response of switch. However, the detection result of this method is easily affected by the detection method of personnel, the pressing force and speed of different personnel exist difference, leading to the stability and reliability of detection data greatly discounted. In addition, the efficiency of manual detection is low, it is difficult to meet the demand of rapid detection on large-scale production line, and in the detection process, the subjective judgment of personnel is easy to introduce error, unable to realize the accurate quantization and standardization of detection result record.

[0004] Therefore, the above problems need to be solved. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above shortage, provides a switch detection fixture, can detect the thin film switch with stable pressure and speed, avoid the influence caused by different detection method of personnel, improve the stability and reliability of test, reduce the error caused by subjective judgment of personnel, meet the demand of rapid detection.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a switch testing fixture, including a base plate, a support column and a support frame connected to the top surface of the base plate, a testing mechanism slidably connected to the support column, and a drive mechanism connected to the side of the support frame near the support column. The drive mechanism and the testing mechanism are driven together, and the drive mechanism drives the testing mechanism to move up and down along the support column. The testing mechanism includes a pressing device and a contact pin, and the contact pin is electrically connected to an electrical testing device. During testing, the pressing device applies pressure to the membrane switch, and the contact pin abuts against the power contact. The drive mechanism is configured as an adjustable-speed cylinder, which can control the descent speed of the pressing device, avoid changes in pressing force caused by rapid descent of the pressing device, and improve test stability. When testing a membrane tactile switch on a circuit board, the circuit board is placed on top of a base plate. The drive mechanism is activated, moving the testing mechanism towards the base plate until the pressing device applies the designed pressure to the membrane tactile switch. The contact pin contacts the power contact, and the electrical testing device detects the continuity of the power contact or the resistance value between the power contacts. The electrical testing device records the test results. If the power contact is not conductive or the resistance value does not meet the design requirements, the circuit board is considered unqualified, thus achieving automatic testing of the membrane tactile switch. This invention can test membrane contact switches with stable pressure and speed, avoiding the influence of different human testing methods, improving the stability and reliability of the test, reducing errors caused by subjective judgment, and meeting the needs of rapid testing.

[0007] Furthermore, in the aforementioned switch testing fixture, the testing mechanism includes a support plate, which is slidably connected to a bushing and a support column. An opening is provided on the side of the support plate away from the support frame, forming support arms on both sides of the support plate. Testing arms are tunably connected to the support arms, and a probe is connected to the end of the testing arm away from the support arm. A support platform is provided at the opening of the support plate, and a pressing device is connected to the top surface of the platform. By adjusting the connection angle between the testing arm and the support arm, the position of the probe can be adjusted to meet the testing requirements of different circuit boards, improving the adaptability and flexibility of the switch testing fixture.

[0008] Furthermore, in the aforementioned switch detection fixture, the detection arm has a through groove along its long axis, and a fastener is inserted into the through groove to connect the detection arm to the support arm. The detection arm can move along the through groove, thereby extending or retracting relative to the support arm, increasing the adjustment range of the probe and improving the adaptability and flexibility of the switch detection fixture.

[0009] Furthermore, in the aforementioned switch testing fixture, the end of the testing arm connected to the contact pin has a boss, and the contact pin simultaneously passes through the boss. The boss increases the contact area between the contact pin and the testing arm, increases the friction between the contact pin and the testing arm, prevents the contact pin from loosening, improves the contact pin connection strength, and ensures the stability of the test.

[0010] Furthermore, in the aforementioned switch testing fixture, multiple connection holes are arrayed along the long side of the support arm, and the testing arm is connected to any one of the connection holes via fasteners. The testing arm can be connected to any of the connection holes on the support arm according to actual testing needs, and the position of the probe can be adjusted to meet the testing requirements of different circuit boards, thereby improving the adaptability and flexibility of the switch testing fixture.

[0011] Furthermore, in the aforementioned switch testing fixture, the pressing device includes a cylindrical portion, with a pressing rod coaxially connected to the bottom surface of the cylindrical portion. The pressing rod passes through a through hole in the support platform, and the cylindrical portion is connected to the top surface of the support platform. When the pressing rod presses the membrane contact switch, if the support plate continues to move downward, the cylindrical portion and the support platform separate, so that the membrane contact switch is only subjected to the gravity of the pressing device, ensuring stable pressure and improving testing accuracy.

[0012] Furthermore, in the aforementioned switch testing fixture, a connecting post is coaxially connected to the top surface of the cylindrical portion, and a weight is connected to the top surface of the cylindrical portion. The connecting post passes through a through hole provided in the weight. One or more weights can be used, allowing one or more weights to be inserted into the cylindrical portion as needed for testing, providing sufficient pressing force to meet testing requirements and improving the adaptability and flexibility of the switch testing fixture.

[0013] Furthermore, in the aforementioned switch testing fixture, a first limiting platform and a second limiting platform are connected to the top surface of the base plate. Both the first and second limiting platforms are rectangular, with the first limiting platform being longer than the second. The first limiting platform connects between the pressing device and the support column. The first limiting platform is connected to the top surface of the base plate through first oblong through holes at both ends. The second limiting platform is connected to one end of the first limiting platform and is connected to the top surface of the base plate through a second oblong through hole. During testing, the circuit board abuts against the first and second limiting platforms, which provide positioning for the circuit board, ensuring its positional accuracy and improving testing speed. The first and second limiting platforms move along the first and second oblong through holes, respectively, thereby adjusting the positioning of the circuit board and improving the flexibility of their positioning.

[0014] Furthermore, in the aforementioned switch detection fixture, the long axis of the first waist-shaped through hole is parallel to the long side of the base plate, and the long axis of the second waist-shaped through hole is perpendicular to the long axis of the first waist-shaped through hole.

[0015] Furthermore, in the aforementioned switch testing fixture, the top surface of the base plate is provided with fixing holes, which are arranged in an array along the side of the base plate. The first and second limiting stages are connected within the fixing holes. The first and second limiting stages can be connected to any fixing hole to meet the testing needs of different circuit boards and improve the flexibility of the switch testing fixture.

[0016] Furthermore, in the aforementioned switch testing fixture, in order to improve the structural strength of the support frame, the cross-section of the support frame is designed as an I-beam.

[0017] As can be seen from the above technical solution, this utility model has the following beneficial effects: The switch testing fixture of this utility model can contact the membrane contact switch with stable pressure and speed, avoiding the influence of different testing methods by personnel, improving the stability and reliability of the test, reducing errors caused by subjective judgment, and meeting the needs of rapid testing. Simultaneously, one or more weights can be inserted into the cylindrical part according to testing needs to provide the required pressing force, improving the adaptability and flexibility of the switch testing fixture. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the switch detection fixture.

[0019] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0020] Figure 3 This is a schematic diagram of the structure of the detection arm;

[0021] Figure 4 for Figure 1 A magnified view of a portion of the image.

[0022] In the diagram: 1. Base plate, 11. Fixing hole, 2. Support column, 3. Detection mechanism, 31. Support plate, 311. Support arm, 312. Detection arm, 3121. Through groove, 3122. Boss, 313. Support platform, 314. Connecting hole, 32. Pressing device, 321. Cylindrical part, 322. Pressing rod, 323. Connecting column, 324. Weight, 33. Stylus, 4. Drive mechanism, 5. First limiting platform, 51. First waist-shaped through hole, 6. Second limiting platform, 61. Second waist-shaped through hole, 7. Support frame. Detailed Implementation

[0023] Example 1

[0024] like Figure 1 The switch testing fixture shown includes a base plate 1, with a support column 2 and a support frame 7 connected to the top surface of the base plate 1. A testing mechanism 3 is slidably connected to the support column 2. A drive mechanism 4 is connected to the side of the support frame 7 near the support column 2. The drive mechanism 4 and the testing mechanism 3 are driven together, and the drive mechanism 4 drives the testing mechanism 3 to move up and down along the support column 2. The testing mechanism 3 includes a pressing device 32 and a contact pin 33, which is electrically connected to an electrical testing device. During testing, the pressing device 32 applies a designed pressure to the membrane switch, and the contact pin 33 abuts against the power contact. The drive mechanism 4 is an adjustable-speed cylinder, which can control the descent speed of the pressing device 32, avoiding changes in pressing force caused by rapid descent of the pressing device 32, and improving test stability.

[0025] In this embodiment, a first limiting platform 5 and a second limiting platform 6 are connected to the top surface of the base plate 1. The first limiting platform 5 and the second limiting platform 6 are both rectangular, with the first limiting platform 5 being longer than the second limiting platform 6. The first limiting platform 5 is connected between the pressing device 32 and the support column 2. The first limiting platform 5 is connected to the top surface of the base plate 1 through first oblong through holes 51 at both ends. The second limiting platform 6 is connected to one end of the first limiting platform 5 and is connected to the top surface of the base plate 1 through a second oblong through hole 61. The long axis of the first oblong through hole 51 is parallel to the long side of the base plate 1, and the long axis of the second oblong through hole 61 is perpendicular to the long axis of the first oblong through hole 51. Fixing holes 11 are provided on the top surface of the base plate 1, arranged in an array along the side of the base plate 1. The first limiting platform 5 and the second limiting platform 6 are connected within the fixing holes 11. To improve the structural strength of the support frame 7, the cross-section of the support frame 7 is I-shaped.

[0026] When testing the membrane tactile switch on the circuit board, the circuit board is placed on the top surface of the base plate 1, with the circuit board abutting against the first limiting platform 5 and the second limiting platform 6 respectively. The drive mechanism 4 is activated, driving the detection mechanism 3 to move towards the base plate 1. The pressing rod 322 presses the membrane contact switch, and the support plate 31 continues to move downwards a short distance, separating the cylindrical part 321 from the support platform 313. Simultaneously, the contact pin 33 abuts against the power contact. The electrical testing device detects the continuity of the power contact or the resistance value between the power contacts. The electrical testing device records the test results. If the power contact is continuous or the resistance value meets the design requirements, the circuit board is qualified; otherwise, it is qualified.

[0027] like Figure 2 The switch testing fixture shown includes a testing mechanism 3 comprising a support plate 31, which is slidably connected to a support column 2 via a bushing. An opening is provided on the side of the support plate 31 away from the support frame 7, forming support arms 311 on both sides of the support plate 31. A testing arm 312 is tunably connected to each support arm 311, and a probe 33 is connected to the end of the testing arm 312 away from the support arm 311. A support platform 313 is provided at the opening of the support plate 31, and a pressing device 32 is connected to the top surface of the support platform 313. By adjusting the connection angle between the testing arm 312 and the support arm 311, the position of the probe 33 can be adjusted to meet the testing requirements of different circuit boards, improving the adaptability and flexibility of the switch testing fixture.

[0028] In this embodiment, multiple connection holes 314 are arrayed along the long side of the support arm 311, and the detection arm 312 is connected to any one of the connection holes 314 by fasteners.

[0029] like Figure 3The switch detection fixture shown has a detection arm 312 with a through groove 3121 along its long axis. Fasteners are inserted into the through groove 3121 to connect the detection arm 312 to the support arm 311. One end of the detection arm 312 connected to the contact pin 33 has a boss 3122, and the contact pin 33 passes through the boss 3122.

[0030] like Figure 4 The switch testing fixture shown includes a pressing device 32 comprising a cylindrical portion 321. A pressing rod 322 is coaxially connected to the bottom surface of the cylindrical portion 321. The pressing rod 322 passes through a through hole in the support platform 313. The cylindrical portion 321 is connected to the top surface of the support platform 313. When the pressing rod 322 presses the membrane contact switch, if the support plate 31 continues to move downward, the cylindrical portion 321 and the support platform 313 separate, so that the membrane contact switch is only subjected to the gravity of the pressing device 32, ensuring stable pressure and improving testing accuracy. A connecting post 323 is coaxially connected to the top surface of the cylindrical portion 321, and a weight 324 is connected to the top surface of the cylindrical portion 321. The connecting post 323 passes through a through hole in the weight 324. One or more weights 324 can be provided, and one or more weights 324 can be inserted into the cylindrical portion 321 to provide the pressing force required for testing.

[0031] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A switch detection fixture, characterized in that: The device includes a base plate (1), on the top surface of which a support column (2) and a support frame (7) are connected. The support column (2) is slidably connected to a detection mechanism (3). The support frame (7) is connected to a drive mechanism (4) on the side near the support column (2). The drive mechanism (4) and the detection mechanism (3) are driven together. The drive mechanism (4) drives the detection mechanism (3) to move up and down along the support column (2). The detection mechanism (3) includes a pressing device (32) and a stylus (33). The stylus (33) is electrically connected to an electrical testing device. During testing, the pressing device (32) applies pressure to the membrane switch, and the stylus (33) abuts against the power contact.

2. The switch detection fixture according to claim 1, characterized in that: The detection mechanism (3) includes a support plate (31), which is slidably connected to a bushing and a support column (2). The support plate (31) has an opening on the side away from the support frame (7). The opening of the support plate (31) forms a support arm (311) on both sides of the support plate (31). The support arm (311) is tunably connected to a detection arm (312). The stylus (33) is connected to the end of the detection arm (312) away from the support arm (311). The opening of the support plate (31) is provided with a support platform (313), and the pressing device (32) is connected to the top surface of the support platform (313).

3. The switch detection fixture according to claim 2, characterized in that: The detection arm (312) has a through groove (3121) along its long axis, and a fastener is inserted into the through groove (3121) to connect the detection arm (312) to the support arm (311).

4. The switch detection fixture according to claim 2, characterized in that: The detection arm (312) is connected to a stylus (33) with a boss (3122) at one end, and the stylus (33) passes through the boss (3122).

5. The switch detection fixture according to claim 2, characterized in that: Multiple connection holes (314) are arrayed along the long side of the support arm (311), and the detection arm (312) is connected to any one of the connection holes (314) by fasteners.

6. The switch detection fixture according to claim 2, characterized in that: The pressing device (32) includes a cylindrical part (321), and a pressing rod (322) is coaxially connected to the bottom surface of the cylindrical part (321). The pressing rod (322) passes through a through hole provided in the support (313), and the cylindrical part (321) is connected to the top surface of the support (313).

7. The switch detection fixture according to claim 6, characterized in that: The top surface of the cylindrical part (321) is coaxially connected to a connecting post (323), and the top surface of the cylindrical part (321) is connected to a weight (324). The connecting post (323) passes through a through hole provided in the weight (324).

8. The switch detection fixture according to claim 1, characterized in that: The top surface of the base plate (1) is connected to a first limiting platform (5) and a second limiting platform (6). The first limiting platform (5) and the second limiting platform (6) are respectively rectangular. The first limiting platform (5) is longer than the second limiting platform (6). The first limiting platform (5) is connected between the pressing device (32) and the support column (2). The first limiting platform (5) is connected to the top surface of the base plate (1) through a first waist-shaped through hole (51) provided at both ends. The second limiting platform (6) is connected to one end of the first limiting platform (5). The second limiting platform (6) is connected to the top surface of the base plate (1) through a second waist-shaped through hole (61).

9. The switch detection fixture according to claim 8, characterized in that: The long axis of the first waist-shaped through hole (51) is parallel to the long side of the base plate (1), and the long axis of the second waist-shaped through hole (61) is perpendicular to the long axis of the first waist-shaped through hole (51).

10. The switch detection fixture according to claim 8, characterized in that: The top surface of the base plate (1) is provided with fixing holes (11), and the fixing holes (11) are arranged in an array along the side of the base plate (1); the first limiting platform (5) and the second limiting platform (6) are connected in the fixing holes (11).

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