A testing device for ceramic substrate LED

Abstract

The utility model discloses a kind of testing devices of ceramic substrate LED, including pedestal and the positioning plate of LED ceramic substrate that can be positioned and placed, two sides of pedestal are equipped with positioning shaft respectively, several positioning holes are evenly distributed and are arranged on positioning plate along longitudinal direction, positioning shaft can selectively cooperate and be inserted in positioning hole, first air cylinder and pressing plate are respectively arranged on pedestal above positioning plate, pressing plate is set on first air cylinder, so that pressing plate can be relatively close or far away from the lifting movement of relative positioning plate, probe assembly is set on pressing plate, probe assembly includes several probes, which are evenly distributed and are arranged along the same horizontal transverse direction, the two pins on both sides of the same row LED lamp bead can be respectively and one-to-one corresponding to be lightened, positioning shaft is movably arranged on pedestal, second air cylinder is arranged on pedestal, and positioning plate is arranged on pedestal and can move along longitudinal direction, transmission member is arranged on pedestal, and positioning plate can be displaced forward and backward along with the displacement of positioning shaft.

Description

Technical Field

[0001] This utility model specifically relates to a testing device for ceramic substrate LEDs. Background Technology

[0002] Currently, the testing process for ceramic substrate LEDs requires a testing device to position the LED ceramic substrate and detect the illumination of the LED chips. Existing testing devices have the following drawbacks: the positioning plate for placing the LED ceramic substrate needs to be manually moved to perform row-by-row illumination tests on the LED ceramic substrates on the positioning plate. Such manual operation is inefficient and cannot meet the requirements of automated testing. Utility Model Content

[0003] In view of the defects of the prior art, the technical problem to be solved by this utility model is to provide a testing device for ceramic substrate LEDs. A testing device for ceramic substrate LEDs includes a base and a positioning plate for positioning the LED ceramic substrate. Positioning shafts are respectively provided on both sides of the base. The positioning plate has a plurality of positioning holes evenly distributed longitudinally. Each positioning shaft can be selectively inserted into a positioning hole. A pressure plate and a first cylinder are respectively provided on the base above the positioning plate. The pressure plate is mounted on the first cylinder to allow it to move relatively closer to or further away from the positioning plate. A probe assembly is provided on the pressure plate, comprising a plurality of probes evenly distributed laterally along the same horizontal plane. Each probe can illuminate the pins on both sides of an LED bead in the same row. The positioning shafts are movably mounted on the base. A second cylinder is provided on the base to drive the positioning shafts up and down. The positioning plate is mounted on the base and can move longitudinally. A transmission component is provided on the base to drive the positioning plate to move back and forth with the vertical displacement of the positioning shafts.

[0004] In one embodiment, the transmission component includes a first gear, a second gear, a first rack, and a second rack. The base has a cavity. The first gear and the second gear are rotatably disposed in the cavity and mesh with each other for transmission. The first rack is vertically connected to the lower end of the positioning shaft and is driven to mesh with one side of the first gear. The drive shaft of the second cylinder is connected to the first rack. The second rack is disposed on the positioning plate. A first opening is provided through the upper side of the cavity. The second gear passes through the first opening and is driven to mesh with the second rack.

[0005] In one embodiment, the positioning plate has a movable cavity, and a second opening is provided through the lower side of the movable cavity. The tooth surface of the second rack is exposed outside the positioning plate and meshes with the second gear through the second opening. The second rack is movably disposed in the movable cavity. A spring abuts between the upper side of the movable cavity and the upper side of the second rack. The spring keeps the second rack in a meshing state with the second gear. The base is provided with a lifting member that can lift the second rack to disengage it from the second gear.

[0006] In one embodiment, the lifting member includes a third cylinder and a top shaft disposed on the drive shaft of the third cylinder. The top shaft can be driven by the third cylinder to move upward through the second opening and press against the second rack.

[0007] In one embodiment, a position sensor that can abut against the first rack is disposed on the base directly below the first rack.

[0008] In one embodiment, the upper side of the positioning plate is recessed with a positioning groove for positioning and placing an LED ceramic substrate, and a third opening is provided through the positioning plate on one side of the positioning groove.

[0009] In one embodiment, a guide shaft is provided on the base, and the pressure plate is movably sleeved on the guide shaft via a linear bearing.

[0010] In one embodiment, a guide rail is provided on the upper side of the base along the longitudinal direction, and the positioning plate is movably disposed on the guide rail along the longitudinal direction.

[0011] In summary, the advantages of this utility model over the prior art are: This invention uses a first cylinder to drive the pressure plate to rise and fall, and a second cylinder to drive the positioning shaft to move up and down. In conjunction with the transmission components, the positioning plate moves back and forth, replacing the traditional manual operation and greatly improving the efficiency of LED bead testing. Attached Figure Description

[0012] Figure 1 This is a front view of a testing device for a ceramic substrate LED according to one embodiment of the present invention; Figure 2 This is a top view of a testing device for a ceramic substrate LED according to one embodiment of the present invention; Figure 3 This is a partial cross-sectional view of a testing device for a ceramic substrate LED according to one embodiment of the present invention; Figure 4 This is a partial exploded view of a testing device for a ceramic substrate LED according to one embodiment of the present invention. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 4 The present invention preferably provides a testing device for ceramic substrate LEDs, including a base 1 and a positioning plate 2 for positioning and placing the LED ceramic substrate. Positioning shafts 3 are respectively provided on both sides of the base 1. A plurality of positioning holes 4 are evenly distributed longitudinally on the positioning plate 2. Each positioning shaft 3 can be selectively inserted into a positioning hole 4. A pressure plate 5 and a first cylinder 6 are respectively provided on the base 1 above the positioning plate 2. The pressure plate 5 is mounted on the first cylinder 6 so that it can move relatively closer to or further away from the positioning plate 2. The lifting and lowering movement of the pressure plate 5 is provided with a probe assembly, which includes a plurality of probes 7 evenly distributed at horizontal intervals along the same horizontal direction. The plurality of probes 7 can respectively light up the pins on both sides of the LED beads in the same row. The positioning shaft 3 is movably mounted on the base 1. The base 1 is provided with a second cylinder 8 that can drive the positioning shaft 3 to move up and down. The positioning plate 2 is mounted on the base 1 and can move along its longitudinal direction. The base 1 is provided with a transmission component 9 that can drive the positioning plate 2 to move back and forth with the positioning shaft 3.

[0014] Specifically, in the initial positioning stage: after the device is powered on, the second cylinder is initially in the extended state, driving the positioning shaft to move upward to the "convex state". At this time, the positioning hole at the first end of the positioning plate is manually inserted into the positioning shaft to complete the initial positioning of the positioning plate (the first end of the positioning plate is aligned with the probe assembly below the pressure plate). First row test phase: The first cylinder drives the pressure plate to move downward until the probe contacts the pins on both sides of the first row of LED ceramic substrate on the positioning plate, and the LED beads are lit through the external power supply circuit to complete the first row test; Positioning plate advancement stage: After the first row of tests is completed, the first cylinder drives the pressure plate to rise and reset. Then the second cylinder starts the retraction action, driving the positioning shaft to move downward and gradually disengage from the first positioning hole of the positioning plate. During this process, the second cylinder drives the positioning plate to advance longitudinally forward through the transmission component until it moves to the next row of LED bead test position.

[0015] Furthermore, the transmission component 9 includes a first gear 91, a second gear 92, a first rack 93, and a second rack 94. The base 1 has a cavity 95. The first gear 91 and the second gear 92 are rotatably disposed in the cavity 95 and mesh with each other for transmission. The first rack 93 is vertically connected to the lower end of the positioning shaft 3 and is driven by the first gear 91 on one side. The drive shaft of the second cylinder 8 is connected to the first rack 93. The second rack 94 is disposed on the positioning plate 2. A first opening is provided through the upper side of the cavity 95. The second gear 92 passes through the first opening and is driven by the second rack 94. Furthermore, the positioning plate 2 has a movable cavity 21, and a second opening is provided through the lower side of the movable cavity 21. The tooth surface of the second rack 94 is exposed outside the positioning plate 2 and meshes with the second gear 92 through the second opening. The second rack 94 is movably disposed in the movable cavity 21. A spring 22 is abutted between the upper side of the movable cavity 21 and the upper side of the second rack 94. The spring 22 keeps the second rack 94 and the second gear 92 in a meshing state. The base 1 is provided with a lifting member 23 that can lift the second rack 94 to disengage it from the second gear 92.

[0016] Specifically, the transmission triggering after the first row of LED beads is completed: when the first row of LED beads is tested, the second cylinder switches from the "initial extended state" to the "retracted state", and its drive shaft pulls down the first rack (vertically downward displacement). Positioning plate progressive transmission: The first rack moves down, causing the meshing first gear to rotate clockwise, and the first gear drives the meshing second gear to rotate counterclockwise; the second gear, through meshing with the second rack, converts the rotational motion into the longitudinal linear motion (forward displacement) of the second rack, thereby driving the positioning plate connected to the second rack to move forward, realizing the movement "from the first row of test positions to the next row of test positions"; The transmission locking mechanism during the second cylinder's reset is as follows: After the positioning plate is advanced to its final position, the lifting component lifts the second rack, disengaging it from the second gear. At this point, the second cylinder begins its reset (returning from a retracted state to an extended state), driving the first rack upwards, causing the first gear to rotate counterclockwise and the second gear to rotate clockwise. However, since the second rack has disengaged from the second gear, the idling of the second gear will not cause the positioning plate to retract, ensuring that the positioning plate remains stably in its advanced position. Furthermore, as the second cylinder reverses its movement to reset to the extended state, it drives the positioning shaft to bulge upwards again. At this point, the positioning plate is locked in place by the lifting mechanism and cannot retract. The positioning shaft can then engage with the positioning hole corresponding to the current position of the positioning plate. Furthermore, the lifting member 23 includes a third cylinder 24 and a top shaft 25 disposed on the drive shaft of the third cylinder 24. The top shaft 25 can be driven by the third cylinder 24 to move upward and pass through the second opening to press against the second rack 94. Furthermore, a position sensor that can abut against the first rack 93 is disposed on the base 1 directly below the first rack 93.

[0017] Specifically, the lifting triggering timing is as follows: when the second cylinder retracts to its maximum stroke (the positioning shaft is completely disengaged from the positioning hole of the positioning plate, and the positioning plate has been advanced into place), the position sensor detects that the first rack has moved down to its limit position, sends a signal to the control system, and the control system starts the third cylinder; Locking action: The third cylinder drives the top shaft to move upward, passing through the preset through hole of the base and the second opening of the positioning plate, pushing the lower side of the second rack, causing the second rack to compress the spring and disengage from the second gear. At this time, the second gear can rotate freely, but cannot drive the second rack, and the position of the positioning plate is locked. Release timing: After the second cylinder completes the reset action (returns to the extended state, the positioning shaft protrudes and aligns with the current positioning hole of the positioning plate), the control system sends a signal to the third cylinder. The third cylinder drives the top shaft to reset downwards, the top shaft disengages from the second rack, and the second rack resets and meshes with the second gear under the action of the spring. The lifting component completes one lock-reset cycle.

[0018] Furthermore, the positioning plate 2 has a recessed positioning groove 26 on its upper side for positioning and placing the LED ceramic substrate, and a third opening 27 is provided on one side of the positioning groove 26 on the positioning plate 2. This third opening facilitates the worker's hand to pick up and place the LED ceramic substrate in the positioning groove.

[0019] Furthermore, a guide shaft 28 is provided on the base 1, and the pressure plate 5 is movably mounted on the guide shaft 28 via a linear bearing. This ensures the stable vertical displacement of the pressure plate.

[0020] Furthermore, a guide rail 29 is provided on the upper side of the base 1 along the longitudinal direction, and the positioning plate 2 is movably disposed on the guide rail 29 along the longitudinal direction.

[0021] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A testing device for ceramic substrate LEDs, comprising a base (1) and a positioning plate (2) for positioning and placing LED ceramic substrates, wherein positioning shafts (3) are respectively provided on both sides of the base (1), and a plurality of positioning holes (4) are evenly distributed along the longitudinal direction on the positioning plate (2), wherein one of the positioning shafts (3) can be selectively inserted into the positioning hole (4), characterized in that: The base (1) is provided with a pressure plate (5) and a first cylinder (6) above the positioning plate (2). The pressure plate (5) is provided on the first cylinder (6) so that the pressure plate (5) can move up and down relative to the positioning plate (2). The pressure plate (5) is provided with a probe assembly. The probe assembly includes a number of probes (7) evenly distributed along the same horizontal direction. The number of probes (7) can light up the pins on both sides of the LED beads in the same row. The positioning shaft (3) is movably mounted on the base (1). The base (1) is provided with a second cylinder (8) that can drive the positioning shaft (3) to move up and down. The positioning plate (2) is mounted on the base (1) and can move along its longitudinal direction. The base (1) is provided with a transmission component (9) that can drive the positioning plate (2) to move back and forth with the positioning shaft (3) moving up and down.

2. The testing apparatus for ceramic substrate LEDs according to claim 1, characterized in that: The transmission component (9) includes a first gear (91), a second gear (92), a first rack (93) and a second rack (94). The base (1) has a cavity (95). The first gear (91) and the second gear (92) are rotatably disposed in the cavity (95) and mesh with each other. The first rack (93) is vertically connected to the lower end of the positioning shaft (3) and meshes with the first gear (91) on one side. The drive shaft of the second cylinder (8) is connected to the first rack (93). The second rack (94) is disposed on the positioning plate (2). A first opening is provided through the upper side of the cavity (95). The second gear (92) passes through the first opening and meshes with the second rack (94).

3. The testing apparatus for ceramic substrate LEDs according to claim 2, characterized in that: The positioning plate (2) has a movable cavity (21) and a second opening is provided through the lower side of the movable cavity (21). The tooth surface of the second rack (94) is exposed outside the positioning plate (2) and meshes with the second gear (92) through the second opening. The second rack (94) is movably arranged in the movable cavity (21). A spring (22) abuts between the upper side of the movable cavity (21) and the upper side of the second rack (94). The spring (22) keeps the second rack (94) and the second gear (92) in a meshing state. The base (1) is provided with a lifting member (23) that can lift the second rack (94) to disengage it from the second gear (92).

4. The testing apparatus for ceramic substrate LEDs according to claim 3, characterized in that: The lifting component (23) includes a third cylinder (24) and a top shaft (25) disposed on the drive shaft of the third cylinder (24). The top shaft (25) can be driven by the third cylinder (24) to move upward through the second opening and press against the second rack (94).

5. The testing apparatus for ceramic substrate LEDs according to claim 3, characterized in that: A position sensor that can abut against the first rack (93) is provided on the base (1) directly below the first rack (93).

6. The testing apparatus for ceramic substrate LEDs according to claim 1, characterized in that: The positioning plate (2) has a recessed positioning groove (26) on its upper side that can position and place the LED ceramic substrate. A third opening (27) is provided on the positioning plate (2) on one side of the positioning groove (26).

7. The testing apparatus for ceramic substrate LEDs according to claim 1, characterized in that: A guide shaft (28) is provided on the base (1), and the pressure plate (5) is mounted on the guide shaft (28) by means of a linear bearing.

8. The testing apparatus for ceramic substrate LEDs according to claim 1, characterized in that: The base (1) is provided with a guide rail (29) along the longitudinal direction on the upper side, and the positioning plate (2) is movably mounted on the guide rail (29) along the longitudinal direction.

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